1. Department of Paediatric and Adolescent Oncology; University College London Hospitals NHS Foundation Trust; London UK
2. CHU Reims; Reims France
3. Cancer Research UK & UCL Cancer Trials Centre; University College London; London UK
4. CHRU Lille; Lille France
5. AP-HP; Robert Debré Hospital; Paris France
6. Cancer Research UK Clinical Trials Unit; School of Cancer Sciences; University of Birmingham; Birmingham UK
7. Gustave Roussy; Villejuif France
8. Department of Cellular Pathology; University College London Hospitals NHS Foundation Trust; London UK
9. CHU Nancy; Nancy France
10. Insititut Curie; Paris France
11. CHU Montpellier; Montpellier France
12. Service d'hématologie et d'oncologie pédiatrique; Hopital A, Trousseau, 75571 APHP/UPMC Univ Paris 06; Paris France
13. CHU de Bordeaux; Bordeaux France
14. Paediatric Haematology/Oncology Unit; Children's Hospital, Oxford University Hospitals NHS Foundation Trust; Oxford UK