1. Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and Laboratory of Stem Cell, Development and Reproductive Medicine, Department of Anatomy, Histology and Embryology, Peking University Health Science Center, Beijing, China
2. Key Laboratory of Assisted Reproduction, Ministry of Education, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Second Hospital, Beijing, China
3. Key Laboratory of Assisted Reproduction, Ministry of Education, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China