1. Department of Otolaryngology, Ajou University School of Medicine, Suwon, Republic of Korea
2. Department of Otolaryngology, Uijeongbu Eulji Medical Center, Eulji University, Uijeongbu, Republic of Korea
3. Bk21 Plus Research Center for Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea