1. Department of Otorhinolaryngology‐Head and Neck Surgery Dongguk University Ilsan hospital Goyang South Korea
2. Department of Neurology Jeonbuk National University Hospital, Jeonbuk National University School of Medicine Jeonju South Korea
3. Department of Pharmacology Hue University of Medicine and Pharmacy Hue University Hue Vietnam
4. Department of Neurology Ewha Womans University Mokdong Hospital Seoul South Korea
5. Department of Neurology Ulsan University Hospital Ulsan South Korea
6. Department of Neurology The Catholic University, Incheon Saint Mary's Hospital Incheon South Korea
7. Department of Otorhinolaryngology‐Head and Neck Surgery The Catholic University, Incheon Saint Mary's Hospital Incheon South Korea
8. Department of Otorhinolaryngology‐Head and Neck Surgery Sungkyunkwan University, Samsung Changwon Hospital Changwon South Korea
9. Department of Otorhinolaryngology‐Head and Neck Surgery Pusan National University Hospital Busan South Korea
10. Department of Neurology Pusan National University Hospital Busan South Korea
11. Department of Otorhinolaryngology‐Head and Neck Surgery Dankook University Hospital Cheonan South Korea
12. Department of Otorhinolaryngology‐Head and Neck Surgery Hallym University Sacred Heart Hospital Anyang South Korea
13. Department of Otorhinolaryngology‐Head and Neck Surgery Sungkyunkwan University, Samsung Seoul Hospital Seoul South Korea
14. Department of Otolaryngology‐Head and Neck Surgery Kosin University Hospital Busan South Korea
15. Department of Otorhinolaryngology‐Head and Neck Surgery Eulji University, Nowon Eulji Medical Center Seoul South Korea
16. Department of Otorhinolaryngology‐Head and Neck Surgery National Medical Center Seoul South Korea
17. Department of Neurology Keimyung University Keimyung University Dongsan Hospital Daegu South Korea
18. Department of Otorhinolaryngology‐Head and Neck Surgery Ewha Womans University Mokdong Hospital Seoul South Korea
19. Department of Otorhinolaryngology‐Head and Neck Surgery Soonchunhyang University Bucheon Hospital Bucheon South Korea