1. Department of Oral and Maxillofacial Surgery, Center of Stomatology, Xiangya Hospital of Central South University, Changsha, Hunan, China
2. Research Center of Oral and Maxillofacial Tumor, Xiangya Hospital of Central South University, Changsha, Hunan, China
3. Institute of Oral Cancer and Precancerous Lesions, Central South University, Changsha, Hunan, China