1. Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine; National University of Singapore; Singapore
2. Department of Gynecology & Obstetrics, Nanfang Hospital; Southern Medical University; Guangzhou China
3. Cancer Science Institute of Singapore; National University of Singapore; Singapore
4. Department of Laboratory Medicine, Molecular Diagnosis Centre; National University Hospital; Singapore
5. Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine; National University of Singapore; Singapore
6. Department of Reproductive Medicine; KK Women's and Children's Hospital; Singapore