1. Department of Neurosurgery, Medical University of South Carolina, Charleston
2. Department of Neurosurgery, Thomas Jefferson University, Philadelphia, Pennsylvania
3. Department of Neurosurgery, Emory University, Atlanta, Georgia
4. Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
5. Department of Radiology, University of Basel, Basel, Switzerland
6. Department of Neurosurgery, Wake Forest University, Winston-Salem, North Carolina
7. Department of Radiology, West Virginia University, Morgantown
8. Department of Neurosurgery, University of Miami Health System, Miami, Florida
9. Department of Neurology, University of Iowa, Iowa City
10. Department of Neurosurgery, Semmes-Murphey Neurologic and Spine Clinic, University of Tennessee Health Science Center, Memphis
11. Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
12. Department of Neurosurgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
13. Department of Neurosurgery, University of Texas Medical Branch, Galveston
14. Neuroradiology Department, Hospital São José Centro Hospitalar, Lisboa, Portugal
15. Department of Neurosurgery, University of Florida, Gainesville
16. Department of Neurological Surgery, Washington University in St Louis, St Louis, Missouri
17. Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio
18. Department of Neurosurgery, University of Washington, Seattle
19. Department of Neurosurgery, Allegheny Health Network, Pittsburgh, Pennsylvania
20. Department of Radiology, A.O.U.S. Giovanni di Dio e Ruggi d’Aragona, Salerno, Italy
21. Department of Neurosurgery, Endovascular Neurological Center, Montevideo, Uruguay
22. Department of Diagnostic and Therapeutic Neuroradiology, Centre Hospitalier Régional Universitaire de Nancy, Nancy, France
23. Department of Neurosurgery, University of South Florida, Tampa
24. Department of Neurology, Indiana University, Indianapolis
25. Department of Cerebrovascular and Endovascular Neurosurgery, Hospital Juan Fernandez, Buenos Aires, Argentina
26. Department of Interventional Neuroradiology, Washington Regional Medical Center, Fayetteville, Arkansas
27. Department of Neurosurgery, University of Utah, Salt Lake City
28. Department of Neurosurgery, Texas Stroke Institute, Plano
29. Department of Neurosurgery, University of Virginia Health, Charlottesville