PMID- 34788506 OWN - NLM STAT- MEDLINE DCOM- 20211203 LR - 20211214 IS - 1533-4406 (Electronic) IS - 0028-4793 (Linking) VI - 385 IP - 21 DP - 2021 Nov 18 TI - Hematopoietic Stem- and Progenitor-Cell Gene Therapy for Hurler Syndrome. PG - 1929-1940 LID - 10.1056/NEJMoa2106596 [doi] AB - BACKGROUND: Allogeneic hematopoietic stem-cell transplantation is the standard of care for Hurler syndrome (mucopolysaccharidosis type I, Hurler variant [MPSIH]). However, this treatment is only partially curative and is associated with complications. METHODS: We are conducting an ongoing study involving eight children with MPSIH. At enrollment, the children lacked a suitable allogeneic donor and had a Developmental Quotient or Intelligence Quotient score above 70 (i.e., none had moderate or severe cognitive impairment). The children received autologous hematopoietic stem and progenitor cells (HSPCs) transduced ex vivo with an alpha-L-iduronidase (IDUA)-encoding lentiviral vector after myeloablative conditioning. Safety and correction of blood IDUA activity up to supraphysiologic levels were the primary end points. Clearance of lysosomal storage material as well as skeletal and neurophysiological development were assessed as secondary and exploratory end points. The planned duration of the study is 5 years. RESULTS: We now report interim results. The children's mean (+/-SD) age at the time of HSPC gene therapy was 1.9+/-0.5 years. At a median follow-up of 2.10 years, the procedure had a safety profile similar to that known for autologous hematopoietic stem-cell transplantation. All the patients showed prompt and sustained engraftment of gene-corrected cells and had supraphysiologic blood IDUA activity within a month, which was maintained up to the latest follow-up. Urinary glycosaminoglycan (GAG) excretion decreased steeply, reaching normal levels at 12 months in four of five patients who could be evaluated. Previously undetectable levels of IDUA activity in the cerebrospinal fluid became detectable after gene therapy and were associated with local clearance of GAGs. Patients showed stable cognitive performance, stable motor skills corresponding to continued motor development, improved or stable findings on magnetic resonance imaging of the brain and spine, reduced joint stiffness, and normal growth in line with World Health Organization growth charts. CONCLUSIONS: The delivery of HSPC gene therapy in patients with MPSIH resulted in extensive metabolic correction in peripheral tissues and the central nervous system. (Funded by Fondazione Telethon and others; ClinicalTrials.gov number, NCT03488394; EudraCT number, 2017-002430-23.). CI - Copyright (c) 2021 Massachusetts Medical Society. FAU - Gentner, Bernhard AU - Gentner B AUID- ORCID: 0000-0001-6024-4718 AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Tucci, Francesca AU - Tucci F AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Galimberti, Stefania AU - Galimberti S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Fumagalli, Francesca AU - Fumagalli F AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - De Pellegrin, Maurizio AU - De Pellegrin M AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Silvani, Paolo AU - Silvani P AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Camesasca, Chiara AU - Camesasca C AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Pontesilli, Silvia AU - Pontesilli S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Darin, Silvia AU - Darin S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Ciotti, Francesca AU - Ciotti F AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Sarzana, Marina AU - Sarzana M AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Consiglieri, Giulia AU - Consiglieri G AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Filisetti, Chiara AU - Filisetti C AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Forni, Giulia AU - Forni G AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Passerini, Laura AU - Passerini L AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Tomasoni, Daniela AU - Tomasoni D AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Cesana, Daniela AU - Cesana D AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Calabria, Andrea AU - Calabria A AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Spinozzi, Giulio AU - Spinozzi G AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Cicalese, Maria-Pia AU - Cicalese MP AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Calbi, Valeria AU - Calbi V AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Migliavacca, Maddalena AU - Migliavacca M AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Barzaghi, Federica AU - Barzaghi F AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Ferrua, Francesca AU - Ferrua F AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Gallo, Vera AU - Gallo V AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Miglietta, Simona AU - Miglietta S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Zonari, Erika AU - Zonari E AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Cheruku, Patali S AU - Cheruku PS AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Forni, Claudia AU - Forni C AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Facchini, Marcella AU - Facchini M AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Corti, Ambra AU - Corti A AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Gabaldo, Michela AU - Gabaldo M AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Zancan, Stefano AU - Zancan S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Gasperini, Serena AU - Gasperini S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Rovelli, Attilio AU - Rovelli A AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Boelens, Jaap-Jan AU - Boelens JJ AUID- ORCID: 0000-0003-2232-6952 AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Jones, Simon A AU - Jones SA AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Wynn, Robert AU - Wynn R AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Baldoli, Cristina AU - Baldoli C AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Montini, Eugenio AU - Montini E AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Gregori, Silvia AU - Gregori S AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Ciceri, Fabio AU - Ciceri F AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Valsecchi, Maria G AU - Valsecchi MG AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - la Marca, Giancarlo AU - la Marca G AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Parini, Rossella AU - Parini R AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Naldini, Luigi AU - Naldini L AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Aiuti, Alessandro AU - Aiuti A AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. FAU - Bernardo, Maria-Ester AU - Bernardo ME AD - From the Departments of Hematology and Bone Marrow Transplantation (B.G., F. Ciceri), Pediatric Immunohematology and Bone Marrow Transplantation (F.T., F. Fumagalli, S.D., F. Ciotti, M.S., G.C., C. Filisetti, M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., A.A., M.-E.B.), Neurology and Neurophysiology (F. Fumagalli), Pediatric Orthopedics (M.D.P.), Anesthesia and Critical Care (P.S.), Pediatric Cardiology (C.C.), and Neuroradiology (S.P., C.B.) and the San Raffaele Telethon Institute for Gene Therapy (B.G., F.T., F. Fumagalli, L.P., D.T., D.C., A.C., G.S., M.-P.C., V.C., M.M., F.B., F. Ferrua, V.G., S.M., E.Z., P.S.C., M.F., A.C., E.M., S. Gregori, R.P., L.N., A.A., M.-E.B.), IRCCS San Raffaele Scientific Institute, Vita-Salute San Raffaele University (F. Ciceri, L.N., A.A., M.-E.B.), and Bicocca Bioinformatics, Biostatistics, and Bioimaging Center, School of Medicine and Surgery, University of Milano-Bicocca (S. Galimberti, M.G.V.), Milan, Fondazione Telethon, Rome (C. Forni, M.G., S.Z.), the Department of Experimental and Clinical Biomedical Sciences, University of Florence, and Newborn Screening, Biochemistry and Pharmacology Laboratory, Meyer Children's University Hospital (G.F., G.M.), Florence, and the Department of Pediatrics, Fondazione Monza e Brianza per il Bambino e la sua Mamma, San Gerardo Hospital, Monza (S. Gasperini, A.R., R.P.) - all in Italy; Stem Cell Transplantation and Cellular Therapies, MSK Kids, Memorial Sloan Kettering Cancer Center, New York (J.-J.B.); and the Willink Unit, Manchester Centre for Genomic Medicine, St. Mary's Hospital, Manchester University NHS Foundation Trust, University of Manchester (S.A.J.), and the Department of Blood and Marrow Transplantation, Royal Manchester Children's Hospital (R.W.) - both in Manchester, United Kingdom. CN - MPSI Study Group LA - eng SI - ClinicalTrials.gov/NCT03488394 SI - EudraCT/2017-002430-23 PT - Clinical Trial, Phase I PT - Clinical Trial, Phase II PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - N Engl J Med JT - The New England journal of medicine JID - 0255562 RN - 0 (Glycosaminoglycans) RN - EC 3.2.1.76 (IDUA protein, human) RN - EC 3.2.1.76 (Iduronidase) SB - IM CIN - N Engl J Med. 2021 Nov 18;385(21):2003-2004. PMID: 34788512 MH - Child, Preschool MH - Female MH - Follow-Up Studies MH - *Genetic Therapy MH - Genetic Vectors MH - Glycosaminoglycans/urine MH - *Hematopoietic Stem Cell Transplantation MH - Humans MH - Iduronidase/deficiency/genetics/*metabolism MH - Infant MH - Lentivirus MH - Male MH - Mucopolysaccharidosis I/metabolism/*therapy MH - Mutation MH - Stem Cell Transplantation MH - Transplantation, Autologous FIR - Basilico, Federica IR - Basilico F FIR - Bykova, Tatiana IR - Bykova T FIR - Calvi, Maria Rosa IR - Calvi MR FIR - Castelle, Martin IR - Castelle M FIR - Bona, Maria Della IR - Bona MD FIR - Elenga, Narcisse IR - Elenga N FIR - De Las Heras, Javier IR - De Las Heras J FIR - Funghini, Silvia IR - Funghini S FIR - Groselj, Urh IR - Groselj U FIR - Malvagia, Sabrina IR - Malvagia S FIR - Martin, Elise IR - Martin E FIR - Mikhaylova, Svetlana IR - Mikhaylova S FIR - Neven, Benedicte IR - Neven B FIR - Njuieyon, Falucar IR - Njuieyon F FIR - Ombrone, Daniela IR - Ombrone D FIR - Serafini, Marta IR - Serafini M FIR - Tal, Galit IR - Tal G FIR - Visagalli, Ilaria IR - Visagalli I EDAT- 2021/11/18 06:00 MHDA- 2021/12/15 06:00 CRDT- 2021/11/17 17:34 PHST- 2021/11/17 17:34 [entrez] PHST- 2021/11/18 06:00 [pubmed] PHST- 2021/12/15 06:00 [medline] AID - 10.1056/NEJMoa2106596 [doi] PST - ppublish SO - N Engl J Med. 2021 Nov 18;385(21):1929-1940. doi: 10.1056/NEJMoa2106596.