[1] Konkuk Univ, Sch Med, Dept Otorhinolaryngol Head & Neck Surg, Med Ctr,Res Inst Med Sci, Seoul, South Korea
[2] Pusan Natl Univ, Sch Med, Pusan Natl Univ Hosp, Dept Neurol, 179 Gudeok Ro, Busan 602739, South Korea
[3] Biomed Res Inst, 179 Gudeok Ro, Busan 602739, South Korea