1. Assisted Reproduction Center, Northwest Women’s and Children’s Hospital, Xi’an, People’s Republic of China
2. Medicine Department, Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia
3. Department of Obstetrics and Gynaecology, Royal Women’s Hospital, University of Melbourne, Parkville, Victoria, Australia
4. Pregnancy Research Centre, Department of Maternal-Fetal Medicine, Royal Women’s Hospital, Parkville, Victoria, Australia
5. Leuven Institute for Fertility & Embryology, Leuven, Belgium