[1] Pusan Natl Univ, Dept Otorhinolaryngol, Sch Med, Pusan Natl Univ Hosp, Yangsan 626770, Gyeongsangnam, South Korea
[2] Pusan Natl Univ, Biomed Res Inst, Sch Med, Pusan Natl Univ Hosp, Yangsan 626770, Gyeongsangnam, South Korea
[3] Wallace Mem Baptist Hosp, Dept Otorhinolaryngol, Busan, South Korea
[4] Kosin Univ, Coll Med, Dept Otolaryngol, Busan, South Korea
[5] Inje Univ, Dept Otolaryngol, Haeundae Paik Hosp, Gimhae, South Korea
[6] Busan St Marys Med Ctr, Dept Otorhinolaryngol, Busan, South Korea
[7] Pusan Natl Univ, Dept Otorhinolaryngol, Yangsan Hosp, Yangsan 626770, Gyeongsangnam, South Korea
[8] Pusan Natl Univ, Res Inst Convergence Biomed Sci & Technol, Yangsan Hosp, Yangsan 626770, Gyeongsangnam, South Korea