1. Princess Máxima Center for Pediatric Oncology Utrecht the Netherlands
2. Dutch Childhood Oncology Group Utrecht the Netherlands
3. Department of Public Health Erasmus University Medical Center Rotterdam the Netherlands
4. Department of Pathology Radboud University Medical Center Nijmegen the Netherlands
5. Department of Pediatric Oncology/Hematology Erasmus University Medical Center Sophia Children’s Hospital Rotterdam the Netherlands
6. Department of Radiation Oncology University Medical Center Utrecht Utrecht the Netherlands
7. Department of Hematology University Medical Center Groningen Groningen the Netherlands
8. Department of Research Netherlands Comprehensive Cancer Organisation (IKNL) Utrecht the Netherlands
9. Department of Hematology location VU Medical Center Amsterdam UMC Cancer Center Amsterdam Amsterdam the Netherlands
10. Department of Pediatric Oncology Amsterdam UMC Amsterdam the Netherlands
11. Department of Hematology Erasmus MC Cancer Institute Rotterdam the Netherlands