1. Department of Otolaryngology-Head and Neck Surgery, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
2. Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
3. Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul