1. Department of Paediatric Oncology; Institut Curie; Paris France
2. Department of Paediatric Oncology; Royal Manchester Children's Hospital; Manchester United Kingdom
3. Paediatric Oncology Unit; Fondazione IRCCS Istituto Nazionale Tumouri; Milano Italy
4. Institut d'Hématologie et d'Oncologie Pédiatrie; Lyon; France
5. Department of Biostatistics; Institut Curie; Paris France
6. Department of Paediatrics; CHC-Clin Espérance-rue Saint Nicolas; Montegnée Belgium
7. Department of Paediatric Oncology-Hematology; Erasmus MC/Sophia Children's Hospital; Rotterdam The Netherlands
8. Department of Biostatistics; Institut Gustave Roussy; Villejuif France
9. Paediatric Hematology and Oncology Division; Padova University; Padova Italy
10. Somatic Genetic Unit; Institut Curie; Paris France