1. Department of Paediatric Haematology/Oncology; University Hospital of Rennes; Rennes France
2. Department of Paediatric Haematology/oncology; University Hospital of Nancy; Nancy France
3. Clinical Pharmacology Department; Pharmacoepidemiology Team; University Hospital of Rennes; Rennes France
4. Department of Paediatric Haematology; University Hospital of Robert Debré; Paris France
5. Department of Paediatric Haematology; University Hospital of La Timone; Marseille France
6. Department of Paediatric Haematology/Oncology; University Hospital of Jeanne de Flandre; Lille France
7. Department of Paediatric Haematology; Hospices Civils de Lyon; Lyon France
8. Department of Genetics; University Hospital of Robert Debré and Paris-Diderot University; Paris France
9. Laboratory of Haematology; University Hospital of St Louis; Paris France
10. Laboratory of Haematology; University Hospital of Calmette; Lille France
11. Laboratory of Haematology; University Hospital of Necker; Paris France
12. Department of Paediatric Haematology/Oncology; University Hospital of Villeneuve; Montpellier France
13. Department of Paediatric Haematology/Oncology; University Hospital of Nantes; Nantes France
14. Department of Paediatric Haematology/Oncology; University Hospital of Besançon; Besançon France
15. Department of Paediatric Haematology/Oncology; University Hospital of Hautepierre; Strasbourg France
16. Department of Paediatric Haematology/oncology; University Hospital of Clermont-Ferrand; Clermont-Ferrand France
17. Department of Paediatric Haematology; University Hospital of Rouen; Rouen France
18. Department of Paediatric Haematology/oncology; University Hospital of La Tronche; Grenoble France
19. Department of Paediatric Haematology/oncology; University Hospital of Archet II; Nice France