1. Department of Pediatrics; Curie Institute; Paris France
2. Department of Pediatric Hematology and Oncology; Centre Oscar Lambret; Lille France
3. Centre National de Référence des Aplasies Médullaires Constitutionnelles Rares; Saint-Louis Hospital; Paris France
4. Division of Pediatric Hematology; Robert Debré Hospital; Paris France
5. Registre National des Tumeurs Solides de l'enfant; CHU Nancy; Nancy France
6. Service de Pathologie; Robert Debré Hospital; Paris France
7. Université Paris Descartes; Sorbonne Paris Cité; Paris France
8. Centre Hospitalier Universitaire Lille; Lille France
9. Department of Tumour Biology; Curie Institute; Paris France
10. INSERM U944 and Hematology Laboratory APHP; Saint-Louis Hospital; Paris France
11. Institut Universitaire d'Hématologie; Université Paris Diderot; Paris France
12. INSERM U830; Curie Institute; Paris France