1. Questionnaire Translation Committee of Korean Otologic Society, Korea.
2. HANA ENT Hospital, Seoul, Korea.
3. Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine,Seoul, Korea.
4. Department of Otolaryngology-HNS, The Catholic University of Korea College of Medicine, Seoul, Korea.
5. Department of Otolaryngology, College of Medicine, Kyung Hee University, Seoul, Korea.
6. Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University School of Medicine, Seoul, Korea.
7. Department of Otolaryngology Head & Neck Surgery, Gachon University of Medicine & Science, Incheon, Korea.
8. Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea.
9. Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea.
10. Department of Otorhinolaryngology-Head & Neck Surgery,Dankook University Hospital, Cheonan, Korea.