1. Paediatric Oncology Unit, Hospital Universitario de Málaga Málaga Spain
2. Clinical Trials Unit, Paediatic Oncology, Haematology & Stem Cell Transplant, Hospital Infantil Universitario Niño Jesús Madrid Spain
3. Children and Young People's Unit, The Royal Marsden NHS Foundation Trust London UK
4. Division of Clinical Studies The Institute of Cancer Research London UK
5. Division of Paediatric Haematology & Oncology Hospital Universitari Vall d'Hebron, and Translational Research in Childhood and Adolescent Cancer, Vall d'Hebron Institute de Recerca (VHIR), Vall d'Hebron Barcelona Hospital Campus Barcelona Spain