Affiliation: | 1. Department of Otorhinolaryngology, Head and Neck Surgery, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan;2. Department of Otorhinolaryngology, Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China;3. Department of Radiology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan |