1. The University of Sydney Northern Clinical School Clinical and Population Perinatal Health Research St Leonards NSW Australia
2. Northern Sydney Local Health District Kolling Institute St Leonards NSW Australia
3. Health Informatics, Kolling Institute, Northern Clinical School Sydney Medical School St Leonards NSW Australia
4. Sydney School of Public Health The University of Sydney Sydney NSW Australia
5. Women's and Newborn Health Westmead Hospital Westmead NSW Australia
6. The University of Sydney Sydney NSW Australia