1. Department of Head and Neck Surgery, Nantong Tumor Hospital, Nantong, Jiangsu 226361, P.R. China
2. Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
3. Department of Clinical Pathology, Nantong Tumor Hospital, Nantong, Jiangsu 226361, P.R. China
4. Key Laboratory of Cancer Research Center Nantong, Nantong Tumor Hospital, Nantong, Jiangsu 226361, P.R. China