[1] Pusan Natl Univ, Pusan Natl Univ Hosp, Sch Med, Dept Otorhinolaryngol, Busan, South Korea
[2] Pusan Natl Univ, Pusan Natl Univ Hosp, Sch Med, Biomed Res Inst, Busan, South Korea
[3] Yangsan Hosp, Pusan Natl Univ, Dept Otorhinolaryngol, Yangsan, South Korea
[4] Yangsan Hosp, Pusan Natl Univ, Res Inst Convergence Biomed Sci & Technol, Yangsan, South Korea