1. Department of Epidemiology, The Netherlands Cancer Institute, Amsterdam, The Netherlands;
2. Comprehensive Cancer Center, Utrecht, The Netherlands;
3. Department of Hematology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands;
4. Division of Radiotherapy, Leiden University Medical Center, Leiden, The Netherlands;
5. Department of Hematology, The Netherlands Cancer Institute, Amsterdam, The Netherlands;
6. Department of Hematology, Vrije Universiteit Medical Center, Amsterdam, The Netherlands;
7. Department of Hematology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands;
8. Department of Pediatric Oncology, Emma Children’s Hospital/Academic Medical Center, Amsterdam, The Netherlands;
9. Department of Radiotherapy, University Medical Center Utrecht, Utrecht, The Netherlands;
10. Comprehensive Cancer Center South, Eindhoven, The Netherlands; and
11. Department of Radiotherapy, The Netherlands Cancer Institute, Amsterdam, The Netherlands