Affiliation: | 1.Department of Otolaryngology-Head and Neck Surgery, Soonchunhyang University College of Medicine, Cheonan Hospital, Cheonan, Korea.;2.Division of Brain Korea 21 Program for Biomedical Science, Korea University College of Medicine, Seoul, Korea.;3.Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea. |