1. School of Information and Communication Engineering, University of Electronic Science and Technology of China,Chengdu,China
2. West China Hospital, Sichuan University,Department of Otolaryngology Head and Neck Surgery,Chengdu,China
3. The First People's Hospital of Shuangliu District,Department of Otolaryngology,Chengdu,China
4. Guang'an People's Hospital,Department of Otorhinolaryngology Head and Neck Surgery,Guang'an,China
5. Air force Hospital Medical Service,Department of Otolaryngology, Department in Western Theatre,Chengdu,China