1. Department of Gynecology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan, PRC
2. Laboratory of Cell Biology, Xiangya Medical School, Central South University, Changsha, Hunan, PRC
3. Department of Obstetrics and Gynecology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PRC
4. Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PRC