1. From the Department of Neurology and University of Pittsburgh Medical Center Stroke Institute (T.G.J., R.G., K.U., L.R.W., M.D.H., A.T.); VA Pittsburgh Health Care System (T.G.J.); Department of Radiology and University of Pittsburgh Medical Center Stroke Institute (C.A.J.); and Department of Neurosurgery and University of Pittsburgh Medical Center Stroke Institute (M.B.H.), University of Pittsburgh, Pittsburgh, Penn.