[1] Bundang Jesaeng Gen Hosp, Daejin Med Ctr, Dept Neurol, Seongnam, South Korea
[2] Sungkyunkwan Univ, Kangbuk Samsung Hosp, Dept Neurol, Sch Med, Seoul, South Korea
[3] Eulji Univ, Eulji Hosp, Dept Neurol, Seoul, South Korea
[4] Sungkyunkwan Univ, Neurosci Ctr, Samsung Med Ctr, Dept Neurol,Sch Med, Seoul, South Korea
[5] Yonsei Univ, Severance Hosp, Dept Neurol, Coll Med, Seoul, South Korea
[6] Seoul Med Ctr, Dept Neurol, Seoul, South Korea
[7] Catholic Univ Korea, Coll Med, Dept Neurol, Suwon, South Korea
[8] Ewha Womans Univ, Seoul Hosp, Coll Med, Dept Neurol, Seoul, South Korea
[9] Hallym Univ, Chuncheon Sacred Heart Hosp, Dept Neurol, Coll Med, Chunchon, South Korea
[10] Korea Univ, Dept Neurol, Coll Med, Seoul, South Korea
[11] Chungnam Natl Univ, Dept Neurol, Coll Med, Daejeon, South Korea
[12] Catholic Univic Korea, Uijeongbu St Marys Hosp, Dept Neurol, Coll Med, Uijongbu, South Korea
[13] Inje Univ, Dept Neurol, Coll Med, Seoul, South Korea
[14] Eulji Univ, Dept Neurol, Uijongbu, South Korea
[15] Kyungpook Natl Univ, Sch Med, Dept Neurol, Daegu, South Korea
[16] Gyeongsang Natl Univ, Dept Neurol, Coll Med, Jinju, South Korea
[17] Gyeonsang Natl Univ Hosp, Jinju, South Korea
[18] Dr Chois Neurol Clin, Jeonju, South Korea
[19] Chung Ang Univ Hosp, Dept Neurol, Seoul, South Korea
[20] Hallym Univ, Dongtan Sacred Heart Hosp, Dept Neurol, Coll Med, Hwaseong, South Korea