1. ENT Department, Pavlov First Saint Petersburg State Medical University, Saint Petersburg, Russia
2. ENT Department, K.A. Rauhfus Children’s City Multidisciplinary Clinical Center for High Medical Technologies, Saint Petersburg, Russia
3. Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
4. Department of Otorhinolaryngology-Head and Neck Surgery, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
5. Department of Medicine, The University of Melbourne, Melbourne, Australia
6. Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, School of Clinical Medicine, The University of Hong Kong, Hong Kong SAR, China
7. Department of Otolaryngology-Head and Neck Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
8. Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
9. Department of Otolaryngology, College of Medicine, National Taiwan University, Taipei, Taiwan