1. Medical Oncology Department, Institute for Oncology and Radiology of Serbia, Belgrade, Republic of Serbia
2. Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
3. University Hospital Ghent Cancer Center, Ghent, Belgium
4. European Oncology Nursing Society
5. Children's Cancer and Leukaemia Group, Leicester, UK
6. National Oncology Hospital, Sofia, Bulgaria
7. Youth Cancer Europe, Cluj-Napoca, Romania
8. Childhood Cancer International Europe, Vienna, Austria
9. Department of Hematology, Lyon-Sud Hospital, Hospices Civils de Lyon, Lyon, France
10. The Christie Hospital, Manchester, UK
11. Department of Public Health-University of Grenoble Alps, AYA Unit-Centre Hospitalier Universitaire de Grenoble Alpes, Grenoble, France
12. University Medicine Essen, Clinic for Particle Therapy, West German Proton Therapy Center Essen, Essen, Germany
13. Princess Máxima Center for Pediatric Oncology and University Medical Center Utrecht, Netherlands
14. Department of Oncology, University Hospital of Larissa, Larissa, Greece
15. Leeds Institute of Medical Research, School of Medicine, University of Leeds, Leeds, UK