1. Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital; Pusan Republic of Korea
2. Department of Pathology; Hanmaeum Changwon Hospital; Changwon Gyeongsangnamdo Republic of Korea
3. Department of Pathology; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital; Yangsan Gyeongsangnamdo Republic of Korea
4. Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital; Yangsan Gyeongsangnamdo Republic of Korea
5. Department of Otorhinolaryngology-Head and Neck Surgery; Sungkyunkwan University School of Medicine, Samsung Changwon Hospital Changwon; Gyeongsangnamdo Republic of Korea