1. Department of Head and Neck Surgery, Tumor Hospital of Ganzhou, Ganzhou, Jiangxi 341000, P.R. China
2. Department of General Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
3. Ganzhou Institute of Cancer Research, Tumor Hospital of Ganzhou, Ganzhou, Jiangxi 341000, P.R. China
4. Department of Radiation Oncology, Tumor Hospital of Ganzhou, Ganzhou, Jiangxi 341000, P.R. China