1. Pediatric Hematology/Oncology Department (IHOP); Hospices Civils de Lyon and Centre Léon Bérard; Lyon France
2. Pediatric Hematology Department; University Hospital; Rennes France
3. Pediatric Hematology/Oncology Department; University Hospital; Nantes France
4. Pediatric Hematology/Oncology Department; University Hospital Gasthuisberg; Leuven Belgium
5. Claude Bernard Lyon 1 University; Lyon France