1. Department of Neurology, University Medical Center of the Johannes Gutenberg University Mainz, Germany
2. Department of Neurology, Goethe University Frankfurt/Main, Germany; Department of Neurology, HELIOS Dr Horst Schmidt Clinics Wiesbaden, Germany
3. Institute for Neuroradiology, Goethe University Frankfurt/Main, Germany
4. Department of Neurology, Charité Hospital, Berlin, Germany
5. Institute for Diagnostic and Interventional Radiology and Nuclear Medicine, Charité Hospital, Berlin, Germany
6. Department of Neurology, Medical University Graz, Austria
7. Department of Radiology, Clinical Division of Neuroradiology, Vascular and Interventional Radiology, Medical University Graz, Austria
8. Institute for Radiology, Wagner-Jauregg Hospital, Linz, Austria
9. Department of Neurology, Klinikum Fulda, Germany
10. Institute for Diagnostic and Interventional Neuroradiology, Klinikum Fulda, Germany
11. Department of Neurology, Klinikum Altenburger Land, Altenburg, Germany
12. Institute for Radiology, Klinikum Altenburger Land, Altenburg, Germany
13. Department of Neurology, Vest Klinikum, Recklinghausen, Germany
14. Institute for Radiology and Neuroradiology, Vest Klinikum, Recklinghausen, Germany
15. Department of Neurology, University Hospital Aachen, Germany
16. Institute for Diagnostic and Interventional Neuroradiology, University Hospital Aachen, Germany
17. Department of Neurology and German Center for Neurodegenerative Disease (DZNE), University Hospital Bonn, Germany
18. Institute for Radiology, University Hospital Bonn, Germany
19. Department of Neurology, University Düsseldorf, Medical Faculty, Germany
20. Department of Diagnostic and Interventional Radiology, University Düsseldorf, Medical Faculty, Germany
21. Department of Neurology, University Hospital Essen, Germany
22. Institute for Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Germany
23. Neurovascular Imaging Research Core and UCLA Stroke Center, Department of Neurology, University of California, Los Angeles, USA
24. Institute of Neuroradiology, University Medical Center of the Johannes Gutenberg University Mainz, Germany