1. Department of Otolaryngology-head and Neck Surgery, Department of Oncology and Institute of Medical Sciences, National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province 410008, China
2. Chenzhou Maternal and Child Health Hospital, Chenzhou 423000, China
3. Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
4. Department of Orthopedics, Hand & Microsurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province 410008, China
5. Department of Breast Surgery, Xiangya Hospital, Central South University, Changsha, Hunan Province 410008, China
6. Department of Gastrointestinal, Xiangya Hospital, Central South University, Changsha 410008, China
7. Department of Histology and Embryology, Xiangya School of Medicine, Central South University, Changsha 410013, China
8. Department of Pathology and Institute of Medical Sciences, National Clinical Research Center for Geriatric Diseases, Xiangya Hospital, Central South University, Changsha, Hunan Province 410008, China