1. Department of Neurology Heidelberg University Hospital Heidelberg Germany
2. Department of Radiology Aristotle University of Thessaloniki Thessaloniki Greece
3. Department of Neurology Lausanne University Hospital and University of Lasaunne Lausanne Switzerland
4. Department of Neuroradiology Heidelberg University Hospital Heidelberg Germany
5. Department of Radiology Hamburg University Hospital Hamburg Germany
6. Department of Neurology Helsinki University Hospital Helsinki Finland
7. Department of Radiology Boston Medical Center Boston Massachusetts USA
8. UPMC Stroke Institute University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
9. Department of Neurology Dresden University Hospital Dresden Germany
10. Dresden Neurovascular Center Dresden University Hospital Dresden Germany
11. Institute of Neuroradiology Dresden University Hospital Dresden Germany
12. Stroke Unit, Department of Neurology Hospital Universitario Vall d'Hebron, Universitat Autonoma de Barcelona Barcelona Spain
13. Department of Neuroradiology Centro Hospitalar Universitário de Lisboa Central Lisbon Portugal
14. Department of Neurology, Hospital de Egas Moniz Centro Hospitalar Lisboa Ocidental Lisbon Portugal
15. Neurology and Stroke Unit, Department of Neuroscience Bufalini Hospital Cesena Italy
16. Department of Neurology Radiology Boston Medical Center Boston Massachusetts USA
17. Department of Neurology Klinikum Ludwigshafen Ludwigshafen/Rhein Germany