1. From the Department of Neurology (A.P.J., B.J.M., T.G.J.), University of Pittsburgh Medical Center, PA
2. Department of Neurosurgery (A.P.J., B.J.M., T.G.J.), University of Pittsburgh Medical Center, PA
3. Department of Critical Care Medicine (B.J.M.), University of Pittsburgh Medical Center, PA
4. Department of Clinical Neurosciences, Calgary Stroke Program, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada (M.D.H.).