Accepted for Publication: January 28, 2015.
Published Online: April 20, 2015. doi:10.1001/jamapediatrics.2015.0258.
Study concept and design: Wen, Baur, Rissel.
Acquisition, analysis, or interpretation of data: Wen, Simpson, Xu, Hayes.
Drafting of the manuscript: All authors.
Obtained funding: Wen, Baur, Simpson, Hayes, Hardy, Rissel.
Administrative, technical, or material support: Wen, Baur, Simpson, Xu, Hayes, Hardy, Rissel.
Conflict of Interest Disclosures: None reported.
Funding/Support: This project is funded by grants 393112 and 1003780 from the Australian National Health and Medical Research Council. Dr Hayes was supported by grant 571372 from the Australian National Health and Medical Research Council.
Role of Funder/Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We thank Vicki Flood and the members of the steering committee for their advice and support. We also thank the project team, including Lauren Viney, Maxine Goodwin, Maria Domenico, Emma Wood, Karen Wardle, and Angela Balafas. We thank all the families for their participation in this study.