1. From the Departments of Pediatrics, Biostatistics, Radiology, and Radiotherapy, Institut Gustave Roussy, Villejuif; Department of Neuropathology, University Hospital; Department of Pediatric Hematology/Oncology, La Timone Hospital, Marseille; Department of Pediatric Neurosurgery, Necker Hospital; Department of Pediatrics, Institut Curie, Paris; Department of Pediatrics, Centre Léon Bérard, Lyon; Department of Pediatric Hematology/Oncology, University Hospital, Rennes; and Department of Pediatric...