1. Department of Otorhinolaryngology Dankook University College of Medicine Cheonan South Korea
2. Department of Otorhinolaryngology–Head and Neck Surgery Hanyang University College of Medicine Seoul South Korea
3. Department of Otorhinolaryngology–Head and Neck Surgery Korea University College of Medicine Seoul South Korea
4. Department of Otorhinolaryngology–Head and Neck Surgery Gachon University College of Medicine Incheon South Korea
5. Department of Otorhinolaryngology–Head and Neck Surgery Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea Seoul South Korea
6. Department of Otorhinolaryngology–Head and Neck Surgery Kyung Hee University College of Medicine Seoul South Korea
7. Department of Otorhinolaryngology–Head and Neck Surgery Boramae Medical Center, Seoul National University College of Medicine Seoul South Korea
8. Department of Otorhinolaryngology–Head and Neck Surgery Sungkyunkwan University School of Medicine, Samsung Medical Center Seoul South Korea
9. Department of Otorhinolaryngology–Head and Neck Surgery Seoul National University College of Medicine Seoul South Korea
10. Department of Otorhinolaryngology Yonsei University College of Medicine Seoul South Korea