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, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
4. National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Shandong University, Jinan, Shandong, China
5. Key laboratory of Reproductive Endocrinology of Ministry of Education, Shandong University, Jinan, Shandong, China