[1] Korea Univ, Guro Hosp, Coll Med, Dept Neurol, Seoul, South Korea
[2] Sungkyunkwan Univ, Samsung Med Ctr, Sch Med, Dept Neurol, Seoul, South Korea
[3] Samsung Med Ctr, Neurosci Ctr, Seoul, South Korea
[4] Soonchunhyang Univ, Cheonan Hosp, Dept Neurol, Cheonan, South Korea
[5] Gyeongsang Natl Univ, Sch Med, Changwon Gyeongsang Inst Hlth Sci, Dept Neurol, Chang Won, South Korea
[6] Res Inst & Hosp Natl Canc Ctr, Dept Neurol, Goyang, South Korea
[7] Yonsei Univ, Coll Med, Sevrance Hosp, Dept Neurol, Seoul, South Korea
[8] Korea Univ, Anam Hosp, Coll Med, Dept Neurol, Seoul, South Korea
[9] Keimyung Univ, Sch Med, Dept Neurol, Daegu, South Korea
[10] Jeju Natl Univ, Coll Med, Dept Neurol, Cheju, South Korea
[11] Eulji Univ, Coll Med, Dept Neurol, Seoul, South Korea
[12] Univ Ulsan, Asan Med Ctr, Coll Med, Dept Neurol, Ulsan, South Korea
[13] Chungbuk Natl Univ, Coll Med, Dept Neurol, Cheongju, South Korea
[14] Konkuk Univ, Coll Med, Dept Neurol, Seoul, South Korea
[15] Kosin Univ, Coll Med, Dept Neurol, Busan, South Korea
[16] Dong A Univ Hosp, Dept Neurol, Busan, South Korea
[17] Chungnam Natl Univ, Coll Med, Dept Neurol, Daejeon, South Korea
[18] Inje Univ, Coll Med, Dept Neurol, Ilsan, South Korea
[19] Catholic Univ Korea, Coll Med, Bucheon St Marys Hosp, Dept Neurol, Bucheon, South Korea