1. Department of Neurology, University Hospital Zurich, Zurich, Switzerl
2. Department of Neuropathology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
3. Dr. Senckenberg Institute of Neurooncology, Goethe University Hospital Frankfurt, Frankfurt, Germany
4. Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
5. Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
6. Department of Neurosurgery, University of Dresden, Dresden, Germany
7. Department of Neurosurgery, Ludwig-Maximilians-University Munich, Munich, Germany
8. Division of Clinical Neurooncology, University of Bonn Medical Center, Bonn, Germany
9. Department of Neurology, University Hospital and University of Zurich, Zurich, Switzerl