1. Department of Otolaryngology, Wonkwang University School of Medicine, Wonkwang University Hospital, Iksan, Republic of Korea
2. Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea
3. Department of Biological Sciences, Vanderbilt University, Nashville, TN, USA
4. Department of Otorhinolaryngology-Head and Neck Surgery, Quezon City, Philippines
5. Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea