1. Department of Otorhinolaryngology, School of Medicine, Gyeongsang National University, Jinju, Korea.
2. Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, Korea.
3. Department of Pathology, School of Medicine, Gyeongsang National University, Jinju, Korea.
4. Department of Pediatrics, School of Medicine, Gyeongsang National University, Jinju, Korea.