1. Department of Radiology, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P. R. China
2. Department of Head and Neck Surgery, Hunan Cancer, Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410013, P. R. China
3. Department of Pathology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P. R. China
4. Department of Ultrasound, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P. R. China
5. Department of Infectious Diseases, Taizhou Hospital, Affiliated Hospital of Wenzhou Medical University, Linhai, Taizhou 317000, P. R. China
6. Department of Otolaryngology Head and Neck Surgery, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P. R. China
7. Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P. R. China