1. Department of Neurosurgery, University of Florida College of Medicine, Gainesville, Florida
2. Department of Neurosurgery, Barrow Neurological Institute, Phoenix, Arizona
3. Departments of Neurological Surgery and Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
4. Division of Neurosurgery, Albany Medical Center Hospital, Albany, New York
5. Interventional Neuroradiology, Department of Radiology, West Virginia University School of Medicine, Morgantown, West Virginia
6. Departments of Neurosurgery and Neuroradiology, State University of New York at Stony Brook, New York
7. Neurological Institute of Savannah, Savannah, Georgia
8. ‡Department of Neurological Surgery, New Jersey Capital Health System, Trenton, New Jersey
9. §Departments of Neurosurgery and Radiology, and Toshiba Stroke Research Center, School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York at Buffalo, Buffalo, New York
10. ‖Department of Neurosurgery, University of Puerto Rico, San Juan, Puerto Rico