1. Department of Pediatric Hematology-Oncology, Assistance Publique–Hôpitaux de Marseille, La Timone Hospital, Aix-Marseille University, Marseille, France;
2. Department of Public Health, Laboratoire de Santé Publique (EA 3279) Research Unit, Marseille University Hospital, Aix-Marseille University, Marseille, France;
3. Department of Pediatric Hematology-Oncology, Montpellier University Hospital, Montpellier, France;
4. Department of Pediatric Hematology-Oncology, Nancy University Hospital, Nancy, France;
5. Department of Pediatric Hematology, Jeanne de Flandre Hospital, Lille Nord de France University, Lille, France;
6. Department of Pediatric Hematology-Oncology, Bordeaux University Hospital, Bordeaux, France;
7. Department of Hematology, Huriez Hospital, Lille Nord de France University, Lille, France;
8. Department of Hematology, Haut-Leveque Hospital, Bordeaux University Hospital, Pessac, France;
9. Department of Pediatric Hematology-Oncology, Strasbourg University Hospital, Strasbourg, France;
10. Department of Pediatric Hematology-Oncology, Rouen University Hospital, Rouen, France;
11. Department of Pediatric Hematology-Oncology, Rennes University Hospital, Rennes, France;
12. Department of Hematology-Oncology, Transplant and Cellular Therapy Unit, Paoli-Calmettes Institute, Centre de Recherche en Cancérologie de Marseille and Aix-Marseille University, Marseille, France;
13. Department of Hematology, Edouard Herriot Hospital, Lyon University Hospital, Lyon, France;
14. Department of Pediatric Hematology-Oncology, Nantes University Hospital, Nantes, France;
15. Institute of Pediatric Hematology-Oncology, Lyon University Hospital, Lyon, France;
16. Clinical Research and Innovation Direction, Assistance Publique–Hôpitaux de Marseille, Marseille, France;
17. Department of Hematology, Assistance Publique–Hôpitaux de Paris (AP-HP), Hôpital Saint-Antoine, Université Pierre and Marie Curie, Inserm Unité 938, Paris, France;
18. Eurocord, Hôpital Saint Louis AP-HP, University Paris VII, Paris, France; and
19. Department of Pediatric Hematology, AP-HP, Robert Debré Hospital, Paris Diderot University, Paris, France