1. Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
2. Hearing Research Laboratory, Samsung Medical Center, Seoul, Korea.
3. Sungkyunkwan University School of Medicine, Seoul, Korea.
4. Department of Otorhinolaryngology, Myongji Hospital, Hanyang University Medical Center, Goyang, Korea.