1. Department of Pediatric Hematology; Academic Medical Center; Amsterdam the Netherlands
2. Department of Vascular Medicine; Academic Medical Center; Amsterdam the Netherlands
3. Department of Hematology; Academic Medical Center; Amsterdam the Netherlands
4. Medical Statistics; Department of Biomedical Data Sciences; Leiden University Medical Center; Leiden the Netherlands
5. Mathematical Institute Leiden University; Leiden the Netherlands
6. Dutch Childhood Oncology Group; The Hague the Netherlands
7. Department of Pediatric Oncology/Hematology; Erasmus MC-Sophia Children's Hospital; Rotterdam the Netherlands
8. Princess Máxima Center for Pediatric Oncology; Utrecht the Netherlands
9. Department of Pediatric Oncology; Academic Medical Center; Amsterdam the Netherlands