1. Department of Otorhinolaryngology Head and Neck Surgery, Air Force Medical University, XiJing Hospital, Xian, Shanxi, China
2. Department of Otolaryngology Head and Neck Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
3. Department of Otorhinolaryngology Head and Neck Surgery, The 908th Hospital of Chinese People’s Liberation Army Joint Logistic Support Force, Nanchang, Jiangxi, China