1. Institute of Neurology, Medical University of Vienna, Vienna, Austria;
2. Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria;
3. Department of Neurology, University Hospital St. Poelten, Karl Landsteiner University of Health Sciences, St. Poelten, Austria;
4. Department of Pathology, University Hospital St. Poelten Karl Landsteiner University of Health Sciences, St. Poelten, Austria;
5. Department of Neurology, Medical University of Graz, Graz, Austria;
6. Department of Neuropathology, Institute of Pathology, Medical University of Graz, Graz, Austria;
7. Department of Pathology, Otto-von-Guericke University of Magdeburg, Magdeburg, Germany;
8. Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria;
9. Department of Pathology, Medical University of Innsbruck, Innsbruck, Austria;
10. Department of Neurosurgery, Medical University of Innsbruck, Innsbruck, Austria;
11. Department of Neurology, State Hospital Klagenfurt, Klagenfurt, Austria;
12. Institute of Pathology, State Hospital Klagenfurt, Klagenfurt, Austria;
13. Department of Neuropathology, Neuromed Campus, Kepler University Hospital, Johannes Kepler University of Linz, Linz, Austria;
14. Department of Internal Medicine and Neurooncology, Neuromed Campus, Kepler University Hospital, Johannes Kepler University of Linz, Linz, Austria;
15. Department of Neurology, Neuromed Campus, Kepler University Hospital, Johannes Kepler University of Linz, Linz, Austria;
16. Department of Hematology and Oncology, Kepler University Hospital, Johannes Kepler University of Linz, Linz, Austria;
17. Department of Internal Medicine, Hematology and Oncology, Hospital Elisabethinen, Linz, Austria;
18. Department of Internal Medicine IV, Hospital Wels-Grieskirchen, Wels-Grieskirchen, Austria;
19. Department of Neurology, State Hospital Wiener Neustadt, Wiener Neustadt, Austria;
20. Department of Oncology, Krankenanstalt Rudolfstiftung, Vienna, Austria;
21. Department of Pathology, Krankenanstalt Rudolfstiftung, Vienna, Austria;
22. Department of Pathology, Donauspital Vienna, Vienna, Austria;
23. Department of Neurology, Paracelsus Medical University Salzburg, Salzburg, Austria;
24. Department of Neurosurgery, State Hospital Feldkirch, Feldkirch, Austria;
25. Department of Radiotherapy, Medical University of Vienna, Vienna, Austria;
26. Department of Neurosurgery, Medical University of Vienna, Vienna, Austria;
27. Department of Medicine I, Medical University of Vienna, Vienna, Austria;
28. Austrian National Cancer Registry, Statistics Austria, Vienna, Austria