1. From the Department of Neurology, National Medical Center, Seoul, Korea (J.-H.B.); Departments of Radiology (B.M.K., D.J.K.) and Neurology (J.-H.B., J.Y., H.S.N., Y.D.K., J.H.H.), Yonsei University College of Medicine, Seoul, Korea; Department of Neurology, Sungkyunkwan University School of Medicine, Seoul, Korea (O.Y.B.); and Department of Neurology, Keimyung University College of Medicine, Daegu, Korea (J.Y.).