| Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, National Medical Center, Ulchiro 245, Choong-Gu, Seoul 04564, Korea;2. Department of Otolaryngology–Head and Neck Surgery, Inje University Seoul Paik Hospital, Seoul, Korea;1. Anesthesiology Department, Hospital Geral de Santo António, Porto, Portugal;2. Anesthesiology Department, Hospital Geral de Santo António - Centro Hospitalar do Porto, Porto, Portugal;1. Professor, Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea;2. Resident, Department of Otolaryngology, Konkuk University School of Medicine, Chungju, Republic of Korea;3. Professor, Department of Otolaryngology, Konkuk University School of Medicine, Chungju, Republic of Korea;4. Professor, Department of Otolaryngology, Konkuk University School of Medicine, Chungju, Republic of Korea |
