1. Department of Otorhinolaryngology‐Head and Neck Surgery Seoul National University College of Medicine, Seoul National University Bundang Hospital Sungnam South Korea
2. Department of Public Health Sciences Graduate School of Public Health, Seoul National University Seoul South Korea
3. Department of Otorhinolaryngology Seoul National University College of Medicine, Boramae Medical Center Seoul South Korea
4. Department of Otorhinolaryngology‐Head and Neck Surgery Hanyang University Guri Hospital Guri South Korea
5. Department of Environmental Health Soonchunhyang University Asan South Korea
6. Department of Otorhinolaryngology Seoul National University College of Medicine, Seoul National University Hospital Seoul South Korea