1. From the Pediatrics Department, Statistics Department, Institut Gustave Roussy, Villejuif Cedex; Pediatrics Department, Institut Curie, Paris; Nuclear Medicine Department, Institut Claudius Regaud; Onco-hematology Unit, CHU Purpan, Toulouse; Onco-hematology Department, CHU Pellegrin, Bordeaux; Pediatrics Department, Centre Léon Bérard, Lyon; Pediatric Oncology Unit, CHU La Timone, Marseille; Pediatric Oncology Unit, CHU, Grenoble; Pediatric Oncology Unit, Hopital St Charles, Montpellier; Pediatric...