1. Department of Oral and Maxillofacial Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China
2. Department of Stomatology, The Key Laboratory of Carcinogenesis and Cancer Invasion of The Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
3. NHC Key Laboratory of Carcinogenesis, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, Hunan 410078, P.R. China
4. NHC Key Laboratory of Carcinogenesis, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, Hunan 410078, P.R. China
5. Department of Otolaryngology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
6. Department of Medicine, Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas 77030, USA
7. Department of Oral and Maxillofacial Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China