Department of Otorhinolaryngology- Head and Neck Surgery, Hallym University College of Medicine, Seoul. Korea
2.Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3.Department of Neurosciences, University of California at San Diego, San Diego,
4.Institute of Health Sciences, School of Medicine, Gyeongsang National University, Jinju, South Korea;Department of Otolaryngology, School of Medicine, Gyeongsang National University, Jinju, South Korea