1. Paediatric Haematology and Oncology Unit, University Hospital, Saint-Etienne, France.
2. Childhood Cancer Registry of the Rhône-Alpes Region, University of Saint Etienne, Saint-Etienne, France.
3. Clinical and Exercise Physiology Laboratory, (EA 4607 SNA EPIS), University Hospital, Saint-Etienne, France.
4. Department of Public Health and Medical Informatics, University of Saint Etienne, Saint-Etienne, France.
5. Department of Paediatric Oncology, Institut Gustave Roussy, Villejuif, France.
6. Department of Paediatric Oncology, Institute of Paediatric Haematology and Oncology, Lyon, France.
7. Department of Paediatric Oncology, Institut Curie, Paris, France.
8. Inserm, U1018, Radiation Epidemiology Team, CESP Centre for Research in Epidemiology and Population Health, Villejuif, France.
9. Faculté de Médecine, Université Paris XI, Villejuif, France.
10. Paediatric Haematology and Oncology Unit, University Hospital of Grenoble, Grenoble, France.
11. Department of Paediatric Oncology, Institut Jean Godinot, Reims, France.
12. Department of Paediatric Oncology, Centre Antoine Lacassagne, Nice, France.
13. Department of Paediatric Oncology, Centre Claudius Régaud, Toulouse, France.