1. Health Promotion, Population Health Research and Evaluation Hub, Sydney Local Health District, Camperdown, New South Wales, Australia
2. Sydney School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
3. National Health and Medical Research Council Centre of Research Excellence in the Early Prevention of Obesity in Childhood, Sydney, New South Wales, Australia
4. Discipline of Child and Adolescent Health, Sydney Medical School, The University of Sydney, Sydney, New South Wales, Australia