1. Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea.
2. Department of Biomedical Sciences, BK21 Plus Research Center for Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Korea.
3. Department of Otorhinolaryngology Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.
4. Department of Biomedical Engineering, College of Medicine, Dankook University, Cheonan, Korea.