1. Princess Máxima Center for Pediatric Oncology Utrecht The Netherlands
2. Amsterdam UMC Vrije Universiteit Amsterdam The Netherlands
3. Pediatric Oncology Amsterdam UMC Emma Children's Hospital Vrije Universiteit Amsterdam The Netherlands
4. Dutch Childhood Oncology Group (DCOG) Utrecht The Netherlands
5. Department of Paediatrics, Institute of Clinical Sciences Sahlgrenska Academy at University of Gothenburg Gothenburg Sweden
6. Pediatric Hemato‐Oncology Department Ruth Rappaport Children's Hospital Haifa Israel
7. Julius Center for Health Sciences and Primary Care University Medical Center Utrecht Utrecht University Utrecht the Netherlands
8. Pediatric Oncology and Haematology Department Hospital Universitario y Politécnico La Fe Valencia Spain
9. Department of Paediatrics & Adolescent Medicine Hong Kong Children 's Hospital Ngau Tau Kok Hong Kong
10. Department of Pediatrics Aarhus University Hospital Aarhus Denmark
11. Department of Pediatric Hematology‐Oncology and Stem Cell Transplantation Ghent University Hospital Ghent Belgium
12. Department of Pediatric Oncology Erasmus MC‐Sophia Children's Hospital Rotterdam The Netherlands