1 Department of Research & Development, Netherlands Comprehensive Cancer Organisation (IKNL), P.O. Box 19079, Utrecht, 3501 DB, The Netherlands. v.ho@iknl.nl.
2 Department of Neurology and Neurosurgery, University Medical Centre Utrecht, Utrecht, The Netherlands. v.ho@iknl.nl.
3 Department of Neurology, Radboud University Medical Centre, Nijmegen, The Netherlands.
4 Department of Pathology, Leiden University Medical Centre, Leiden, The Netherlands.
5 Department of Pathology, Erasmus MC Cancer Institute, University Medical Centre Rotterdam, Rotterdam, The Netherlands.
6 Department of Neurology/Brain Tumour Centre, Erasmus MC Cancer Institute, Rotterdam, The Netherlands.
7 Department of Medical Oncology, Amsterdam University Medical Centre, Amsterdam, The Netherlands.
8 Department of Neurology, GROW School for Oncology and Reproduction, Maastricht University Medical Centre, Maastricht, The Netherlands.
9 Department of Radiation Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands.
10 Department of Radiotherapy, University Medical Centre Groningen, Groningen, The Netherlands.
11 Department of Neurosurgery, University Medical Centre Groningen, Groningen, The Netherlands.
12 Department of Neurosurgery, Radboud University Medical Centre, Nijmegen, The Netherlands.
13 Department of Medical Oncology, University Medical Centre Utrecht, Utrecht, The Netherlands.