1. Department of Neurosurgery, Göttingen University Hospital, Göttingen, Germany;
2. Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany;
3. Department of Neurosurgery, University Medicine Rostock, Rostock, Germany;
4. Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA;
5. Department of Neurosurgery, University Hospital Frankfurt, Frankfurt am Main, Germany;
6. Department of Neurosurgery, Jena University Hospital, Jena, Germany;
7. Department of Neurology, Jena University Hospital, Jena, Germany;
8. Department of Medicine, Institute of Biostatistics and Mathematical Modelling, Goethe University, Frankfurt am Main, Germany;
9. Department of Neurology, Göttingen University Hospital, Göttingen, Germany;
10. Department of Neuroradiology, Göttingen University Hospital, Göttingen, Germany;
11. Department of Neuroradiology, Klinikum Stuttgart, Stuttgart, Germany;
12. Department of Neurology, University Hospital Frankfurt, Goethe-University, Frankfurt am Main, Germany;
13. Department of Neurology, University Medicine Rostock, Rostock, Germany