1. Department of Laboratory Medicine, National University Hospital, Singapore
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynaecology, National University Hospital, Singapore
3. Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
4. Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
5. Preimplantation Genetic Diagnosis Centre, Khoo Teck Puat-National University Children’s Medical Institute, National University Hospital, Singapore