1. Parenting Research Centre, Melbourne, Australia
2. National Centre for Epidemiology and Population Health, Australian National University, Canberra, Australia
3. Murdoch Childrens Research Institute, Melbourne, Australia
4. School of Psychological Science, La Trobe University, Melbourne, Australia
5. Deakin Health Economics, Deakin University, Melbourne, Australia
6. Clinical Epidemiology and Biostatistics Unit, Royal Children’s Hospital, Melbourne, Australia
7. Department of Paediatrics, University of Melbourne, Melbourne, Australia
8. Centre for Community Child Health, Royal Children’s Hospital, Melbourne, Australia