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. Department of Obstetrics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Ji’nan, Shandong, China
4. Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Ji’nan, Shandong, China