1. Eurocord, Paris-Diderot University Equipe d'Accueil 3518, Hospital Saint Louis, Paris, France;
2. Monacord, International Observatory on Sickle Cell Disease, Centre Scientifique de Monaco, Monaco;
3. Department of Pediatrics, Referral Center for Sickle Cell Disease, Centre Hospitalier Intercommunal Créteil, Paris XII University, Créteil, France;
4. European Society for Blood and Marrow Transplantation Statistical Unit, Hospital Saint Antoine, Assistance Publique-Hôpitaux de Paris, Paris, France;
5. Department of Medicine, Center for International Blood and Marrow Transplant Research, Medical College of Wisconsin, Milwaukee, WI;
6. Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil;
7. Hemato-Oncology Unit, Hospital Universitaire des Enfants Reine Fabiola, Université Libre de Bruxelles, Brussels, Belgium;
8. Cliniques Universitaires Saint Luc, Hemato-Oncology Unit, Brussels, Belgium;
9. Centre for Haematology, Imperial College London, London, United Kingdom;
10. Hemato-immunology, Hospital Robert Debré and Paris-Diderot University, Paris, France;
11. Pediatric Hematology-Oncology, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Policlinico San Matteo, Pavia, Italy;
12. University of California San Francisco Benioff Children's Hospital, Oakland, CA;
13. Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, Atlanta, GA;
14. Morgan Stanley Children’s Hospital of New York, New York, NY;
15. Baylor College of Medicine, Houston, TX;
16. Children’s Hospital of Michigan, Detroit, MI;
17. Pediatric Blood and Marrow Transplant Program, Duke University Medical Center, Durham, NC;
18. Adolescent and Young Adults Hematology Department, Hospital Saint-Louis, Paris, France;
19. Department of Pediatric Hematology and Oncology and Research Unit Equipe d'Accueil 3279, Aix-Marseille University and Timone Children's Hospital Marseille, Marseille, France;
20. Imperial College London, Hammersmith Hospital, London, United Kingdom;
21. Service D'hémato Oncologie Pédiatrique, Centre Hospitalier Universitaire de Strasbourg, Strasbourg, France;
22. Pediatric Hematology-Immunology Department, Hospital Necker-Enfants Malades, Assistance Publique–Hôpitaux de Paris, Paris, France;
23. Department of Pediatric Hematology and Oncology, University Hospital of Lyon, Lyon, France;
24. Equipe d'Accueil 3829, Institut de Recherche et d'Innovation Biomédicale, Faculté de Médecine-Pharmacie, Rouen, France;
25. Paediatric Haematology/Oncology, King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia;
26. Biotherapy Department, Necker Children’s Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France;
27. Biotherapy Clinical Investigation Center, Groupe Hospitalier Universitaire Ouest, Assistance Publique-Hôpitaux de Paris, INSERM, Paris, France;
28. Paris Descartes–Sorbonne Paris Cité University, Imagine Institute, Paris, France;
29. Stem Cell Transplantation Unit, St. Anna Children's Hospital, Vienna, Austria;
30. Hospital Sirio-Libanes, and Serviço de Hematologia, Hemoterapia e Terapia Celular, São Paulo University, São Paulo, Brazil;
31. Churchill Hospital, Oxford, United Kingdom;
32. Department for Stem Cell Transplantation and Immunology, Clinic for Children and Adolescents, University Hospital Frankfurt, Goethe University, Frankfurt, Germany;
33. Dipartimento di Oncoematologia Pediatrica, Istituto di Ricovero e Cura a Carattere Scientifico, Ospedale Bambino Gesù, Rome, Italy;
34. Dipartimento di Scienze Pediatriche, Università di Pavia, Pavia, Italy; and
35. Department of Hematology and Cell Therapy, Hospital Saint Antoine, Paris, France