Sun-Uk Lee1, Hyo-Jung Kim2, Jeong-Yoon Choi3, Ji-Soo Kim4. 1. Department of Neurology, Ajou University School of Medicine, Ajou University Hospital, Suwon, South Korea. 2. Research Administration Team, Seoul National University Bundang Hospital, Seongnam, South Korea. 3. Department of Neurology, Seoul National University School of Medicine, Seoul National University Bundang Hospital, 173-82 Gumi-ro, Bundang-gu, Seongnam-Si, Gyeonggi-do, 13620, South Korea. 4. Department of Neurology, Seoul National University School of Medicine, Seoul National University Bundang Hospital, 173-82 Gumi-ro, Bundang-gu, Seongnam-Si, Gyeonggi-do, 13620, South Korea. jisookim@snu.ac.kr.