1. From the Department of Neurology (S.J.K., K.G.H., O.Y.B., G.-M.K., C.-S.C., K.H.L.), the Center for Health Promotion (H.Y.S.), and the Departments of Radiology (K.H.K., P.J.) and Neurosurgery (J.S.K., S.-C.H.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea; and the Department of Neurology (K.G.H.), Rodem Hospital, Seoul, South Korea.