About the Authors

Simon Chapman

simon.chapman@sydney.edu.au

Affiliation Sydney School of Public Health, University of Sydney, New South Wales, Australia

Alexis St. George

Affiliation Sydney School of Public Health, University of Sydney, New South Wales, Australia

Karen Waller

Affiliation Sydney School of Public Health, University of Sydney, New South Wales, Australia

Vince Cakic

Affiliation Sydney School of Public Health, University of Sydney, New South Wales, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: SC AStG KW VC. Wrote the paper: SC AStG KW VC. Conceived of study: SC. Collected data: SC AStG KW VC. Contributed to writing: SC AStG KW VC.