1. Department of Gynecology and Obstetric, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
2. Department of Animal Science, Medical College, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
3. Department of Histology and Embryology, Medical College, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
4. Jiangxi Province Key Laboratory of Tumor Pathogen’s and Molecular Pathology, Nanchang 330006, P.R. China