1. Department of Otorhinolaryngology, National Medical Center, Seoul, Korea.
2. Department of Rheumatology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
3. Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
4. Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
5. Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Korea.