1. Department of Otorhinolaryngology Gyeongsang National University Hospital Jinju Republic of Korea
2. Institute of Health Sciences, Gyeongsang National University Jinju Republic of Korea
3. Department of Otorhinolaryngology Gyeongsang National University Changwon Hospital Changwon Republic of Korea
4. Departments of Otorhinolaryngology‐Head & Neck Surgery Hallym University College of Medicine Anyang Republic of Korea