1. Department of Paediatric and Adolescent Oncology; Institut Gustave Roussy; Villejuif France
2. American Memorial Hospital, CHU de Reims; Reims France
3. Unit of Pediatric Hematology and Oncology; Rue Lamfadel Cherkaoui Rabat Institut; Children Hospital, Rabat; Rabat Morocco
4. Department of Neuropathology; Sainte-Anne Hospital; Paris France
5. Department of Radiation Oncology; Institut Gustave Roussy; Villejuif France
6. Department of Neurosurgery; Necker-Enfants Malades Hospital; Paris France
7. Physical Medicine and Rehabilitation Department for Children With Acquired Neurological Injuries; Hôpital National de Saint Maurice; Saint-Maurice France
8. Department of Biostatistics and Epidemiology; Institut Gustave Roussy; Villejuif France