Affiliation: | 1. Institute of Anatomy and Histology &2. Embryology;3. School of Basic Medical Sciences;4. Lanzhou University, China;5. Institute of Pathogenic Biology;6. Lanzhou University;7. China;8. Department of Obstetrics and Gynecology;9. Gansu Provincial People’s Hospital;10. Lanzhou, China;11. Department of Pathology;12. the First Hospital of Lanzhou University;13. Hysteroscopic Center, Maternal and Child Health Care Hospital of Lanzhou City |