1. Department of Obstetrics and Gynaecology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
2. Shenzhen Key Laboratory of Fertility Regulation, Reproductive Medicine Center, The University of Hong Kong—Shenzhen Hospital, Shenzhen 518000, China
3. Centre for Translational Stem Cell Biology, Building 17W, The Hong Kong Science and Technology Park, Hong Kong, China