1. Pediatric Immuno‐Hemato‐Oncology Unit CHU Angers Angers France
2. Pediatric Oncology and Hematology Unit CHU Saint Denis de la Réunion Bellepierre France
3. Department of Child and Adolescent Cancer Gustave Roussy Institute Villejuif France
4. Pediatric Oncology La Timone Hospital Marseille France
5. Lyon University, Jean Monnet University, INSERM, U1059, Sainbiose, University Hospital, Pediatric Hematology‐Oncology Department Saint‐Etienne France
6. Pediatric Oncology CHU Dijon‐Bourgogne Dijon France
7. Hematology, Immunology and Oncology Children's Hospital Toulouse France
8. Pediatric Oncology Unit CLCC Oscar Lambret Lille France
9. Pediatric Oncology Institute of Pediatric Hematology and Oncology (IHOPe) Lyon France
10. Pediatric Oncology and Hematology CHRU Tours Tours France
11. Pediatric Oncology and Hematology CHU Jean‐Minjoz Besançon France
12. Hemato‐Immuno‐Oncology Trousseau Hospital APHP Paris France
13. Pediatric Hemato‐oncology CHU Rouen ‐ Child Hospital Rouen France
14. Pediatric Oncology CHU Limoges Limoges France
15. Pediatric Onco‐Hematology CHU Grenoble ‐ Hôpital Couple‐Enfant La Tronche France
16. Pediatric Clinical Research Platform CHU Angers Angers France
17. Pediatric Immuno‐Hemato‐Oncology Unit CHU Nantes Nantes France
18. Pediatric Hematology and Oncology CHU Bordeaux Bordeaux France
19. French National Registry of Childhood Solid Tumors CHU Nancy Nancy France
20. Inserm UMR 1153, Centre of Research in Epidemiology and StatisticS (CRESS) Paris University Epidemiology of Childhood and Adolescent Cancers Team (EPICEA) Paris France
21. SIREDO Oncology Centre (Care, Innovation and Research for Children, Adolescents and Young Adults with Cancer) Institut Curie PSL University Paris France