About the Authors

So Young Kim

Roles Writing – original draft, Writing – review & editing

Affiliation Department of Otorhinolaryngology-Head & Neck Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea

Songyong Sim

Roles Formal analysis

Affiliation Department of Statistics, Hallym University, Chuncheon, Korea

Hyo Geun Choi

Roles Conceptualization, Formal analysis, Writing – review & editing

pupen@naver.com

Affiliation Department of Otorhinolaryngology-Head & Neck Surgery, Hallym University College of Medicine, Anyang, Korea

Competing Interests

The authors have declared that no competing interests exist.