1. From the Department of Neurology, Hallym University College of Medicine, South Korea; Department of Neurology, National Medical Center, South Korea; Department of Neurology, Dong-A University Hospital, South Korea; Department of Neurology, Nowon Eulji Hospital, South Korea; Department of Neurology, Seoul National University Bundang Hospital, South Korea; and Department of Psychology, Hallym University, Chunchon, South Korea.