1. Department of Pediatric Hemato‐Oncology, University Hospital of Rennes Rennes France
2. Pediatric Hematology and Oncology Department, Armand Trousseau Hospital, APHP Paris France
3. Department of the Institute of Pediatric Hematology and Oncology, University Hospital of Lyon Lyon France
4. Department of Pediatric Hematology, Robert Debre Hospital, APHP Paris France
5. Pediatric Hematology Oncology Department, University Hospital of Bordeaux Bordeaux France
6. Department of Pediatric Onco‐Hematology, University Hospital of Reims Reims France
7. Department of Hematological Oncology and Cell Therapy, University Hospital of Poitiers Poitiers France
8. Pediatric Hematology and Oncology Department, La Timone Children's Hospital, AP‐HM Marseille France
9. Pediatric Hematology Oncology Unity, University Hospital of Besançon Besançon France
10. Pediatric Hematology and Oncology Immunology Department, University Hospital of Angers Angers France
11. Pediatric Immuno‐Hemato‐Oncology Department, University Hospital of Grenoble Grenoble France
12. Department of Pediatric Onco‐Hematology, University Hospital of Montpellier Montpellier France
13. Department of Pediatric Onco‐Hematology, University Hospital of Saint‐Etienne Saint‐Etienne France
14. Pediatric Oncology and Hematology Department, University Hospital of Nancy (CHRU Nancy) Nancy France
15. Department of Pediatric Hemato‐Oncology, University Hospital of Toulouse Toulouse France
16. Department of Pediatric Onco‐Hematology, University Hospital of Nantes Nantes France
17. Cytogenetic and Cell Biology Department, University Hospital of Rennes Rennes France
18. Rennes University, University Hospital of Rennes, Inserm, CIC 1414 (Centre d'Investigation Clinique de Rennes) Rennes France