1. From the Departments of Neurology (J.T., H.Y., T.T., Y.O., K.N.), Cerebrovascular Medicine (K.T.), Cardiovascular Medicine (T.N., S.Y.), and Radiology (Y.M.), National Cerebral and Cardiovascular Center, Osaka, Japan; and Department of Neurology, Osaka University Graduate School of Medicine, Japan (J.T., Y.G., K.T., M.S.).