1. Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
2. Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea.
3. Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Korea.
4. Department of Immunology, Seoul National University Graduate School of Medicine, Seoul, Korea.
5. Department of Otolaryngology-Head and Neck Surgery, Seoul National University Boramae Hospital, Seoul, Korea.
6. Department of Otorhinolaryngology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Korea.