1. Department of Otorhinolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
2. Department of Head and Neck Surgery, Cancer Hospital, Fudan University, Shanghai 200032, China
3. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
4. Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China