1. Division of Pediatric Hematology and Oncology, Hospital Universitario Niño Jesús, Madrid, Spain
2. Princess Máxima Center, Utrecht, the Netherlands
3. Division of Pediatric Hematology and Oncology, Hospital Clínico Universitario de Valencia, Biomedical Research Institute, INCLIVA, Valencia, Spain
4. Pediatric and Adolescent Oncology Department, Gustave Roussy Cancer Campus, INSERM U1015, Université Paris-Saclay, Villejuif, France
5. Institut Curie & Université Versailles St Quentin & INSERM U900 STAMPM, Paris, France
6. Department of Pediatric Oncology, Erasmus MC-Sophia Children's Hospital, Rotterdam, the Netherlands
7. Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
8. Pediatric and Adolescent Oncology Drug Development, Children & Young People's Unit, The Royal Marsden NHS Foundation Trust, London, United Kingdom
9. Division of Clinical Studies and Cancer Therapeutics, The Institute of Cancer Research, London, United Kingdom
10. SIREDO Cancer Center (Care, Innovation and Research in Pediatric, Adolescents, and Young Adults Oncology), Curie Institute Paris, and University Paris Cité, Paris, France
11. Innovative Therapies for Children with Cancer, Gustave Roussy Cancer Campus, Villejuif, France
12. Institute of Cancer and Genomic Sciences, NIHR Birmingham Biomedical Research Centre, University of Birmingham, Birmingham, United Kingdom
13. Division of Pediatric Hematology and Oncology, Hospital Universitari Vall d'Hebron, Barcelona, Spain