[1] Ajou Univ, Sch Med, Ajou Univ Hosp, Dept Neurol, Suwon 441749, South Korea
[2] Soon Chun Hyang Univ, Dept Neurol, Gumi Hosp, Gumi, South Korea
[3] Kyungdong Univ, Dept Biomed Lab Sci, Goseong Gun, Gangwon Do, South Korea
[4] Univ Sassari, Dept Biomed Sci, I-07100 Sassari, Italy
[5] Seoul Natl Univ, Bundang Hosp, Coll Med, Dept Neurol, Songnam 463707, Gyeonggi Do, South Korea