1. Pediatrics and AYA Oncology Department, Centre Oscar Lambret, Lille, France
2. Anatomopathology Department, Universitary Hospital Center, Lille, France
3. Pediatric Orthopedic Surgery Department, Universitary Hospital Center, Lille, France
4. Pediatric Oncology Department, Centre Léon Bérard IHOPE, Centre Léon Bérard, Lyon, France