1. Department of Otorhinolaryngology Head and Neck Surgery, Liaocheng People’s Hospital, Liaocheng, China
2. Shandong First Medical University (Shandong Academy of Medical Sciences), Jinan, China
3. Research Department of Liaocheng People’s Hospital, Liaocheng People’s Hospital, Liaocheng, China
4. Liaocheng Medical Insurance Fund Audit Center, Liaocheng, China
5. Department of Pathology, Liaocheng People’s Hospital, Liaocheng, China
6. Department of Otorhinolaryngology Head and Neck Surgery, Liaocheng Dongchangfu People’s Hospital, Liaocheng, China
7. Weifang Medical University, Weifang, China.