1. From the Departments of Clinical Neurosciences (A.M.D.) and Radiology (A.M.D.), Calgary Stroke Program, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, AB, Canada
2. Stroke Center and Department of Neurology, Stanford University School of Medicine, CA (G.W.A.)
3. Departments of Neurology (R.G.N.), Neurosurgery (R.G.N.), and Radiology (R.G.N.), Emory University School of Medicine, Atlanta, GA
4. Marcus Stroke and Neuroscience Center, Grady Memorial Hospital, Atlanta, GA (R.G.N.).