1 Department of Epidemiology and Biostatistics, Netherlands Cancer Institute, Amsterdam, the Netherlands.
2 Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands.
3 Department of Radiology, Academic Medical Center Amsterdam, Amsterdam, the Netherlands.
4 Department of Radiology, University Medical Center Utrecht, the Netherlands.
5 Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, MD.
6 Luxembourg Institute of Science and Technology (LIST), Esch-sur-Alzette, Luxembourg.
7 Department of Radiology and Nuclear Medicine, Erasmus MC, Rotterdam, the Netherlands.
8 Department of Neurology and Paediatric Neurology, Erasmus MC, Sophia Children's Hospital, Rotterdam, the Netherlands.
9 Department of Internal Medicine, University Medical Center Utrecht, the Netherlands.
10 Department of Radiology and Nuclear Medicine, Radboud University Medical Center, Nijmegen, the Netherlands.
11 Department of Paediatric Oncology, Emma Children's Hospital, Academic Medical Center Amsterdam, Amsterdam, the Netherlands.
12 Dutch Childhood Oncology Group, the Hague, the Netherlands (JHM); Department of Registration, Netherlands Comprehensive Cancer Organisation, Utrecht, the Netherlands.