1. Center for Reproductive Medicine, Cheeloo College of Medicine Shandong University Jinan Shandong China
2. National Research Center for Assisted Reproductive Technology and Reproductive Genetics Shandong University Jinan Shandong China
3. Key laboratory of Reproductive Endocrinology of Ministry of Education Shandong University Jinan Shandong China
4. Shandong Provincial Clinical Medicine Research Center for Reproductive Health Shandong University Jinan Shandong China