1. Department of Hematology, Radboud Institute for Health Sciences Radboud University Medical Center Nijmegen The Netherlands
2. Princess Máxima Centre for Pediatric Oncology Utrecht The Netherlands
3. Department of Health Technology & Services Research, Technical Medical Center University of Twente Enschede The Netherlands
4. Oncology, Department of Clinical Sciences Lund Lund University, Skåne University Hospital Lund Sweden
5. Childhood Cancer Research Group Danish Cancer Society Research Center Copenhagen Denmark
6. Department of Clinical Medicine Aarhus University and Aarhus University Hospital Aarhus Denmark
7. Pediatrics, Department of Clinical Sciences Lund Lund University, Skåne University Hospital Lund Sweden
8. International Clinical Research Center (FNUSA‐ICRC) at St. Anne's University Hospital Masaryk University Brno Czech Republic
9. Department of Pediatrics, Emma Children's Hospital Amsterdam UMC Amsterdam The Netherlands
10. Faculty of Medicine Utrecht University and Utrecht Medical Center Utrecht the Netherlands
11. DOPO Clinic, Division of Pediatric Hematology and Oncology IRCCS Istituto Giannina Gaslini Genoa Italy
12. PanCare Bussum The Netherlands
13. Childhood Cancer International—Europe Vienna Austria
14. Department of Oncology, Pediatric Oncology, KU Leuven, Department of Pediatric Hematology and Oncology University Hospitals Leuven Leuven Belgium
15. Wolfson Childhood Cancer Research Center, Newcastle University Centre for Cancer Newcastle University Newcastle upon Tyne UK
16. Great North Children's Hospital Royal Victoria Infirmary Newcastle upon Tyne UK
17. Wolfson Childhood Cancer Research Center, Translational and Clinical Research Institute Newcastle Universtiy Newcastle upon Tyne UK
18. Population Health Sciences Institute Newcastle University Newcastle upon Tyne UK
19. Scientific Institute for Quality of Healthcare (IQ Healthcare), Radboud Institute for Health Sciences Radboud University Medical Center Nijmegen The Netherlands