1. Department of Pediatrics, Dr. von Hauner Children’s Hospital, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany;
2. Paediatric Stem Cell Transplant Unit, Great North Children’s Hospital, Newcastle upon Tyne, United Kingdom;
3. Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom;
4. Hematology/Oncology/Immunology, Gene Therapy, and Stem Cell Transplantation, University Children’s Hospital Zurich–Eleonore Foundation & Children’s Research Center, Zürich, Switzerland;
5. Statistical and Study Unit, EBMT office, Leiden, The Netherlands;
6. CEREDIH, SCETIDE, Necker-Enfants Malades University Hospital, Assistance Publique Hôpitaux de Paris, Paris, France;
7. Pediatric Immunohematology, IRCCS Ospedale San Raffaele, Milan, Italy;
8. Vita Salute San Raffaele University, Milan, Italy;
9. Scientific Department, Belarusian Research Center for Pediatric Oncology, Hematology and Immunology, Borovlyany, Minsk Region, Belarus;
10. Department of Hematopoietic Stem Cell Transplantation, Dmitriy Rogachev National Center for Pediatric Hematology, Oncology, and Immunology, Moscow, Russian Federation;
11. Bone Marrow Transplantation Unit, National Institute of Children’s Diseases, Bratislava, Slovakia;
12. Department of Pediatric Hematology and Oncology, Comenius University, Bratislava, Slovakia;
13. Pediatric Hematology, CHU Lille, Lille, France;
14. Biotherapy Department and Clinical Investigation Center, Assistance Publique Hôpitaux de Paris, Paris, France;
15. IMAGINE Institute, Université de Paris, Sorbonne Paris Cité, Paris, France;
16. Bone Marrow Transplant Department, Great Ormond Street Hospital For Sick Children, London, England;
17. Necker-Enfants Malades University Hospital, Assistance Publique Hôpitaux de Paris, Paris, France;
18. Department for Children and Adolescent Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark;
19. Clinical Department of Paediatric Bone Marrow Transplantation, Oncology and Haematology, Wroclaw Medical University, Wroclaw, Poland;
20. RM Gorbacheva Research Institute, Pavlov University, St. Petersburg, Russian Federation;
21. Pediatric Hematology Oncology, Akdeniz University School of Medicine, Antalya, Turkey;
22. Department of Pediatrics, BMT Unit, Hacettepe University, Faculty of Medicine, Ankara, Turkey;
23. Princess Máxima Center, Utrecht, The Netherlands;
24. Department of Pediatric Hematoloy/Oncology, Cell and Gene Therapy, University Medical Center, University Utrecht, Utrecht, The Netherlands;
25. Department of Pediatric Hematoloy/Oncology, Cell and Gene Therapy, Bambino Gesù Children’s Hospital, Sapienza University, Rome, Italy;
26. Division of Pediatric Stem Cell Therapy, Department of Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany;
27. Pediatric Immunology, Hematology and Rheumatology Department, Necker-Enfants Malades University Hospital, Assistance Publique Hôpitaux de Paris, Paris, France;
28. Pediatric Oncohaematology and BMT, Children’s Hospital, Brescia, Italy;
29. Pediatric Hematology and Oncology, MHH, Hannover, Germany;
30. Department of Pediatric Hematology and Oncology, University Hospital Motol, Prague, Czech Republic;
31. Department of Pediatrics, University Medical Center Ulm, Ulm, Germany;
32. Adult Hematology, Necker-Enfants Malades University Hospital, Assistance Publique Hôpitaux de Paris, Paris, France;
33. Department of Pediatrics, Karolinska University Hospital Huddinge, Clintec, Karolinska Institutet, Stockholm, Sweden;
34. Pediatric Hematology/Oncology, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy;
35. University College London, GOS Institute of Child Health, London, England; and
36. Department of Pediatrics, Pediatric Stem Cell Transplantation Program, Willem-Alexander Children’s Hospital, Leiden University Medical Center, The Netherlands