1. Gynecological Oncology Research and Engineering Center of Hunan Province, Changsha, China;
2. Department of Gynecology, Xiangya Hospital, Central South University, Changsha, China;
3. Institute of Medical Sciences, Xiangya Hospital, Central South University, Changsha, China;
4. Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, China