1. Department of Otolaryngology, Gyeongsang National University School of Medicine, Jinju, Korea.
2. Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, Korea.
3. Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Department of Laboratory Medicine, Gyeongsang National University School of Medicine, Jinju, Korea.
5. Department of Otorhinolaryngology-Head and Neck Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
6. Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.