1. From the Department of Neurology, Chonnam National University Hospital, Gwangju, Korea (J.-T.K.)
2. Department of Neurology and Comprehensive Stroke Center, David Geffen School of Medicine (D.S.L., J.L.S.), University of California Los Angeles
3. Division of Interventional Neuroradiology (R.J.), University of California Los Angeles
4. Departments of Radiology and Clinical Neurosciences, University of Calgary, Alberta, Canada (B.K.M., M.G.)
5. Marcus Stroke and Neuroscience Center, Department of Neurology, Grady Memorial Hospital, Emory University School of Medicine, Atlanta, GA (R.G.N.)
6. Division of Neuroradiology and Division of Neurosurgery, Department of Medical Imaging and Department of Surgery, Toronto Western Hospital, University Health Network, University of Toronto, Ontario, Canada (V.M.P.)
7. Department of Diagnostic and Interventional Neuroradiology, Inselspital, University Hospital Bern, University of Bern, Switzerland (J.G.).