1. Great Ormond Street Hospital for Children NHS Trust; London UK
2. Watford General Hospital; Watford UK
3. Fred Hutchinson Cancer Research Center; Seattle WA USA
4. CIBMTR (Center for International Blood and Marrow Transplant Research); Department of Medicine; Medical College of Wisconsin; Milwaukee WI USA
5. Institute of Haematology; St. Orsola University Hospital; Azienda Ospedaliero-Universitaria di Bologna; Bologna Italy
6. Ospedale San Gerardo; Monza Italy
7. EBMT Paediatric Disease Working Party; Paris France
8. British Columbia's Children's Hospital; Vancouver BC Canada
9. Cook Children's Medical Center; Fort Worth TX USA
10. The Hospital for Sick Children; Toronto ON Canada
11. Cincinnati Children's Hospital Medical Center; Cincinnati OH USA
12. Hôpital Necker-Enfants malades; Paris France
13. Klinik/Poliklinik für Kinderheilkunde; Münster Germany
14. Section of Hematology-Oncology; Department of Pediatrics; Baylor College of Medicine and the Center for Cell and Gene Therapy; Houston TX USA
15. Institute G. Gaslini; Genova Italy
16. St. Jude Children's Research Hospital; Memphis TN USA
17. St. Anna Kinderspital; Vienna Austria
18. Hôpital d'Enfants de la Timone; Marseille France
19. Department of Pediatrics; University of Minnesota Medical Center; Minneapolis MN USA
20. Department of Paediatric Oncology; Haematology & HSCT; Poznań Poland
21. Division of Therapeutic Immunology; Department of Laboratory Medicine; Karolinska Institutet; Stockholm Sweden
22. Centre for Allogeneic Stem Cell Transplantation; Stockholm Sweden
23. Department of Paediatric Haematology, Oncology; Paediatric Stem Cell Transplantation Program; University Children's Hospital Wuerzburg; Wuerzburg Germany
24. Hôpital Arnaud de Villeneuve; CHRU Montpellier; Montpellier France
25. University of Helsinki; Helsinki Finland