1. Department of Otorhinolaryngology, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea
2. Department of Otorhinolaryngology‑Head and Neck Surgery, Chuncheon Sacred Heart Hospital and Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, Gangwon 24253, Republic of Korea
3. Department of Otorhinolaryngology, Konkuk University School of Medicine, Chungju, North Chungcheong 27478, Republic of Korea
4. Department of Pharmacology, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea