1. The Reproductive Medicine Center, Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
2. State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
3. Department of Veterinary Pathobiology, University of Missouri-Columbia, Columbia, MO, USA
4. Reproductive Medical Center, Peking University Third Hospital, Beijing, China