1 Department of Neurology, Incheon St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea, #56 Dongsu-ro, Bupyeong-gu, Incheon, 21431, Korea.
2 Department of Neurology, Incheon St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea, #56 Dongsu-ro, Bupyeong-gu, Incheon, 21431, Korea. kimtaewon@catholic.ac.kr.