1. Department of Paediatric Haematology-Oncology; APHM; La Timone Hospital; Aix-Marseille University; Marseille France
2. Department of Public Health -EA 3279 Research Unit; University Hospital Marseille; Aix-Marseille University; Marseille France
3. Department of Paediatric Haematology-Oncology; University Hospital of Nancy; Nancy France
4. Department of Paediatric Haematology-Oncology; University Hospital of Nice; Nice France
5. Department of Paediatric Haematology-Oncology; CIC Inserm 501; University Hospital of Clermont Ferrand; Clermont Ferrand France
6. Department of Paediatric Haematology-Oncology; University Hospital of Lyon; Lyon France
7. Department of Paediatric Haematology-Oncology; University Hospital of Grenoble; Grenoble France
8. Department of Paediatric Haematology-Oncology; University Hospital of Montpellier; Montpellier France