1. Department of Otorhinolaryngology; Pundang Jesaeng Hospital, Deajin Medical Center; Seongnam Gyeonggi Korea
2. Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute; Busan Korea
3. Department of Otorhinolaryngology-Head and Neck Surgery; Pusan National University School of Medicine and Biomedical Research Institute; Yangsan Kyeongnam Korea
4. Department of Pathology; Pusan National University School of Medicine and Biomedical Research Institute; Yangsan Kyeongnam Korea
5. Department of Internal Medicine; Pusan National University School of Medicine and Biomedical Research Institute; Busan Korea
6. Department of Internal Medicine; Pusan National University School of Medicine and Biomedical Research Institute; Yangsan Kyeongnam Korea
7. Department of Otorhinolaryngology-Head and Neck Surgery; Busan St. Marry's Medical Center; Busan Korea