1. Department of Research & Development, Netherlands Comprehensive Cancer Organization (IKNL) , Utrecht , The Netherlands
2. Department of Neurology, Radboud University Medical Center , Nijmegen , The Netherlands
3. Department of Neurosurgery, University Medical Center Groningen , Groningen , The Netherlands
4. Department of Neurology/Brain Tumor Center, Erasmus MC Cancer Institute , Rotterdam , The Netherlands
5. Department of Medical Oncology, Amsterdam University Medical Center , Amsterdam , The Netherlands
6. Department of Radiation Oncology, Erasmus MC Cancer Institute , Rotterdam , The Netherlands
7. Department of Neurosurgery, Radboud University Medical Center , Nijmegen , The Netherlands
8. Department of Radiotherapy, University Medical Center Groningen , Groningen , The Netherlands
9. Department of Pathology, Amsterdam University Medical Center , Amsterdam , The Netherlands
10. Department of Pathology, Princess Máxima Center for Pediatric Oncology , Utrecht , The Netherlands
11. Department of Medical Oncology, University Medical Center Utrecht , Utrecht , The Netherlands