1. Department of Otolaryngology, Head and Neck Surgery, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
2. School of Medicine, National Defense Medical Center, Taipei, Taiwan
3. Department of Otorhinolaryngology, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
4. College of Pharmacy and Science, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
5. Department of Otolaryngology—Head and Neck Surgery, Tan Tock Seng Hospital, Singapore