1. Graduate School, Jinzhou Medical University, Jinzhou, Liaoning, China
2. Key Laboratory of Follicular Development and Reproductive Health of Liaoning Province, Jinzhou Medical University, Jinzhou, Liaoning Province, China
3. Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China
4. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning, China