[1] Pusan Natl Univ, Yangsan Hosp, Dept Neurol, Sch Med, Yangsan, South Korea
[2] Pusan Natl Univ, Sch Med, Pusan Natl Univ Hosp, Dept Neurol, 179 Gudeok Ro, Busan 49241, South Korea
[3] Biomed Res Inst, Busan 49241, South Korea
[4] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Neurol, Seoul, South Korea
[5] Med Res Inst, 179 Gudeok Ro, Busan 49241, South Korea