1. Department of Pediatric Oncology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
2. Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands
3. Department of Epidemiology and Biostatistics, the Netherlands Cancer Institute, Amsterdam, the Netherlands
4. Department of Pediatric Oncology/Hematology, University of Groningen, Beatrix Children’s Hospital, University Medical Center Groningen, Groningen, the Netherlands
5. Department of Pediatric Oncology/Hematology and Medicine section Endocrinology, Sophia Children’s Hospital/Erasmus Medical Center, Rotterdam, the Netherlands
6. Department of Hematology, Radboud University Medical Center, Nijmegen, the Netherlands
7. Department of Pediatric Oncology and Hematology, Wilhelmina Children’s Hospital/University Medical Center Utrecht, Utrecht, the Netherlands
8. Department of Pediatric Oncology/Hematology, Sophia Children’s Hospital/Erasmus Medical Center, Rotterdam, the Netherlands
9. Department of Pediatric Oncology/Hematology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
10. Dutch Childhood Oncology Group, Utrecht, the Netherlands
11. Department of Radiation Oncology, the Netherlands Cancer Institute, Amsterdam, the Netherlands
12. Department of Radiation Oncology, Leiden University Medical Center, Leiden, the Netherlands
13. Department of Radiation Oncology, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
14. Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, the Netherlands
15. Department of Radiation Oncology, University Medical Center Utrecht, Utrecht, the Netherlands
16. Department of Radiation Oncology, University of Groningen/University Medical Center Groningen, Groningen, the Netherlands
17. Department of Radiation Oncology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
18. Department of Radiation Oncology, Erasmus Medical Center, Rotterdam, the Netherlands