1. Department of Neurology, University Hospital Zurich, Zurich, Switzerland
2. Cancer Registry Zurich and Zug, University Hospital Zurich, Zürich, Switzerland
3. University Hospital Zurich, Department of Neuropathology, Zurich, Switzerland
4. University Hospital Zurich, Zurich, Switzerland
5. University Hospital Zurich, Department of Oncology, Zurich, Switzerland
6. University Hospital Zurich, Department of Neurosurgery, Zurich, Switzerland
7. University Hospital Zurich, Department of Neuroradiology, Zurich, Switzerland
8. Chronic Disease Epidemiology, Epidemiology, Biostatistic and Prevention Institute (EBPI), University of Zurich, Zurich, Switzerland
9. Department of Surgery, Neurosurgery, Kantonsspital Winterthur, Winterthur, Switzerland
10. International Agency for Research on Cancer (IARC), Lyon, France