1. Department of Neurology, University of Tennessee Health Science Center, Memphis
2. Semmes-Murphey Neurologic and Spine Clinic, Department of Neurosurgery, University of Tennessee Health Science Center, Memphis
3. Second Department of Neurology, National and Kapodistrian University of Athens, “Attikon” University Hospital, Athens, Greece
4. Department of Neurology, West Virginia University Charleston Division, Charleston
5. Cerebrovascular Program, Vanderbilt University, Nashville, Tennessee
6. Department of Neurosurgery, Medical University of South Carolina, Charleston
7. Department of Neuroradiology, University Medical Center Göttingen, Göttingen, Germany
8. Departments of Neurosurgery and Radiology, University at Buffalo, Buffalo, New York
9. Department of Neurology and Neurogeriatry, Johannes Wesling Medical Center Minden, University Clinic RUB, Minden, Germany
10. Department of Neurology, St Josef-Hospital, Ruhr University of Bochum, Bochum, Germany
11. Department of Neurology, Hamad General Hospital, Doha, Qatar
12. Department of Neurosurgery, University of South Florida, Tampa
13. Department of Neurology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
14. Department of Neurosurgery, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
15. Acute Stroke Unit, Metropolitan Hospital, Piraeus, Greece
16. Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
17. Yong Loo Lin School of Medicine, Division of Neurology, National University Hospital, National University of Singapore, Singapore
18. Stroke Unit, Divisione di Medicina Cardiovascolare, Università di Perugia, Perugia, Italy
19. Department of Interventional and Diagnostic Neuroradiology, Gothenburg, Sweden
20. Department of Neurosurgery, Mount Sinai Medical Center, New York, New York