[1] Hallym Univ, Coll Med, Dongtan Sacred Heart Hosp, Neurol, Hwaseong, South Korea
[2] Eulji Univ, Eulji Hosp, Neurol, Daejeon, South Korea
[3] Sungkyunkwan Univ, Sch Med, Kangbuk Samsung Hosp, Neurol, Seoul, South Korea
[4] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Neurosci Ctr,Neurol, Seoul, South Korea
[5] Severance Hosp, Neurol, Seoul, South Korea
[6] Bundang Jesaeng Hosp, Daejin Med Ctr, Neurol, Seongnam, South Korea
[7] Gyeongsang Natl Univ Hosp, Neurol, Jinju, South Korea
[8] Inje Univ, Coll Med, Neurol, Gimhae, South Korea
[9] Seoul Med Ctr, Neurol, Seoul, South Korea
[10] Chungnam Natl Univ, Coll Med, Neurol, Daejeon, South Korea
[11] Catholic Univ Korea, St Vincents Hosp, Neurol, Suwon, South Korea
[12] Chung Ang Univ, Coll Med, Chung Ang Univ Hosp, Neurol, Seoul, South Korea