1. Yale-NUS College, National University of Singapore, Singapore, Singapore
2. Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
3. Agency for Science, Technology and Research, Singapore Institute for Clinical Sciences, Singapore, Singapore
4. Department of Statistical Science, University College London, London, UK
5. Department of Reproductive Medicine, KK Women's and Children's Hospital, Singapore, Singapore
6. Duke-NUS Medical School, Singapore, Singapore
7. Department of Psychological Medicine, KK Women's and Children's Hospital, Singapore, Singapore
8. Department of Maternal Fetal Medicine, KK Women's and Children's Hospital, Singapore, Singapore