[1] Inst Gustave Roussy, Paediat Oncol, Villejuif, France
[2] Inst Gustave Roussy, Biostat, Villejuif, France
[3] Ctr Hosp Univ Tours, Paediat Oncol, Tours, France
[4] Ctr Hosp Univ Nancy, Paediat Oncol, Nancy, France
[5] Ctr Hosp Univ Strasbourg, Paediat Oncol, Strasbourg, France
[6] Ctr Hosp Univ Nantes, Paediat Haematol, Nantes, France
[7] Ctr Hosp Univ Bordeaux, Paediat Oncol, Bordeaux, France
[8] Ctr Hop Univ Rennes, Paediat Oncol, Rennes, France
[9] Ctr Hosp Univ Lille, Paediat Oncol, Lille, France
[10] Ctr Hosp Univ Toulouse, Paediat Oncol, Toulouse, France
[11] Inst Curie, Pedaitr Oncol, Paris, France
[12] Hop Robert Debre, AP HP, Paediat Haematol, Paris, France