1. Department of Neurology, Emory University School of Medicine, Atlanta, Georgia
2. Swedish Medical Center, Englewood, Colorado
3. Department of Neurology, John F. Kennedy Medical Center, Edison, New Jersey
4. Department of Neurosurgery, St Vincent Mercy Medical Center, Toledo, Ohio
5. Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois
6. Department of Neurosurgery, Medical University of South Carolina, Charleston, South Carolina
7. Forsyth Medical Center, Winston-Salem, North Carolina
8. Physicians Regional Medical Group, Naples, Florida
9. Department of Neurosurgery, University at Buffalo, State University of New York, Buffalo
10. Department of Neurosurgery, Gates Vascular Institute, Kaleida Health, Buffalo, New York
11. Department of Neurology, Froedtert Hospital, Milwaukee, Wisconsin
12. Division of Neuroradiology, Universitätsklinikum Erlangen, Erlangen, Germany
13. Department of Radiology, Texas Stroke Institute, Dallas
14. Department of Radiology, University of Iowa, Iowa City
15. Department of Neurology, Massachusetts General Hospital, Boston
16. Department of Neurosurgery, Lenox Hill Hospital, Northwell Hofstra School of Medicine, New York, New York