Author Contributions: Dr Wong had full access to all the data in the study and takes responsibility for the integrity of the data and accuracy of the data analysis. Study concept and design: Wong, Brooks, Leong, and Sanders. Acquisition of data: Wong and Brooks. Analysis and interpretation of data: Wong, Roberts-Thomson, and Sanders. Drafting of the manuscript: Wong and Sanders. Critical revision of the manuscript for important intellectual content: Wong, Brooks, Leong, Roberts-Thomson, and Sanders. Statistical analysis: Wong. Obtained funding: Sanders. Administrative, technical, and material support: Wong and Sanders. Study supervision: Brooks, Roberts-Thomson, and Sanders.
Financial Disclosure: None reported.
Funding/Support: Dr Wong is supported by a Rhodes Scholarship from the Rhodes Trust. Drs Brooks, Leong, Roberts-Thomson, and Sanders are supported by the National Heart Foundation of Australia. Dr Leong is supported by the National Health and Medical Research Council of Australia and the Royal Australasian College of Physicians.
Previous Presentation: This study was presented in part at the American Heart Association Scientific Sessions (November 2010; Chicago, Illinois) and published in abstract form (Circulation. 2010;122:A18823).
Additional Contributions: Thomas Sullivan, BMaCompSci(Hons), Discipline of Public Health, University of Adelaide, assisted in statistical analysis.