1. Departments of Otorhinolaryngology‐Head & Neck Surgery Hallym University Sacred Heart Hospital Hallym University College of Medicine Anyang Korea
2. Department of Otorhinolaryngology-Head & Neck Surgery CHA Bundang Medical Center CHA University Seongnam Korea
3. Division of Pulmonary, Allergy, and Critical Care Medicine Department of Medicine Hallym University Sacred Heart Hospital Hallym University College of Medicine Anyang Korea