1. Department of Otolaryngology; Gangneung Asan Hospital, University of Ulsan College of Medicine; Gangneung Republic of Korea
2. Department of Otolaryngology; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
3. Department of Pathology; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
4. Biomedical Research Institute; Korea Institute of Science and Technology; Seoul Republic of Korea