1. Center for Reproductive Medicine, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
2. Key Laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China
3. Shandong Key Laboratory of Reproductive Medicine, Jinan, Shandong, China
4. Shandong Provincial Clinical Research Center for Reproductive Health, Jinan, Shandong, China
5. National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
6. State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
7. University of Chinese Academy of Sciences, Beijing, China