1. From the Department of Neurology (S.G.K., G.-M.K., K.H.L., C.-S.C., O.Y.B.), Samsung Medical Center, Sungkyunkwan University, Gangnam-Gu, Seoul, South Korea; Ajou University Hospital (J.M.H.), Suwon, South Korea; Konkuk University Hospital (H.Y.K.), Seoul, South Korea; Yeungnam University Hospital (J.L.) Daegu, South Korea; Kangbuk Samsung Hospital (P.-W.C.), Seoul, South Korea; and Chung-Ang University Hospital (K.-Y.P.), Seoul, South Korea.