1. Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China,
2. Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China,
3. Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, China,
4. National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China,
5. The Key Laboratory for Reproductive Endocrinology of Ministry of Education, Jinan, China, and