1 Departmentof Otorhinolaryngology-Head and Neck Surgery, Konyang University Hospital, Konyang University College of Medicine, Daejeon, Republic of Korea.
2 Department of Biomedical Informatics, College of Medicine, Konyang University, Daejeon, Republic of Korea.
3 Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Republic of Korea.
4 Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, Republic of Korea.