Miao Gao1, Sheng-Nan Ye1, Chang Lin1, Yuan-Teng Xu2. 1. Fujian Otorhinolaryngology Institute, The First Affiliated Hospital of Fujian Medical University, Department of Otorhinolaryngology Head and Neck Surgery, Fujian, PR China. 2. Fujian Otorhinolaryngology Institute, The First Affiliated Hospital of Fujian Medical University, Department of Otorhinolaryngology Head and Neck Surgery, Fujian, PR China. Electronic address: xytent123@163.com.