1 Sydney School of Public Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia.
2 Population Health Research & Evaluation Hub, Sydney Local Health District, Sydney, NSW, Australia.
3 National Health and Medical Research Council (NHMRC) Centre of Research Excellence in the Early Prevention of Obesity in Childhood (EPOCH), The University of Sydney, Sydney, NSW, Australia.
4 School of Public Health, Fudan University, Shanghai, China.