1. State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
2. Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
3. Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
4. National Research Center for Assisted Reproductive Technology and Reproductive Genetics; The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education; Shandong Provincial Key Laboratory of Reproductive Medicine, Jinan, China
5. Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University; Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
6. State Key Laboratory of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, Nanjing, China