1. Department of Obstetrics and Gynecology; Seoul National University Bundang Hospital; Seongnam Republic of Korea
2. Department of Otorhinolaryngology; Seoul National University College of Medicine; Seoul Republic of Korea
3. Cancer Research Institute; Seoul National University; Seoul Republic of Korea
4. Department of Otorhinolaryngology; Asan Medical Center; Seoul Republic of Korea
5. Department of Otorhinolaryngology; Korea Cancer Center Hospital; Seoul Republic of Korea
6. Department of Obstetrics and Gynecology; Seoul National University College of Medicine; Seoul Republic of Korea
7. Major in Biomodulation, World Class University; Seoul National University; Seoul Republic of Korea