1. Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, Reproductive Medicine Center of the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
2. State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
3. State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
4. Houston Fertility Institute/New Houston Health, Houston, Texas