Accepted for Publication: June 5, 2014.
Published Online: September 1, 2014. doi:10.1001/jamapediatrics.2014.1223.
Study concept and design: Elgar, Saul, Craig, Koenig.
Acquisition, analysis, or interpretation of data: Elgar, Napoletano, Saul, Dirks, Craig, Poteat, Holt.
Drafting of the manuscript: Elgar, Napoletano, Saul, Poteat.
Critical revision of the manuscript for important intellectual content: Elgar, Saul, Dirks, Craig, Poteat, Holt, Koenig.
Statistical analysis: Elgar, Saul.
Obtained funding: Elgar.
Administrative, technical, or material support: Koenig.
Study supervision: Elgar, Craig.
Conflict of Interest Disclosures: None reported.
Funding/Support: The study was supported by grants from the Social Sciences and Humanities Research Council (435-2014-2160) and Canada Research Chairs Programme.
Role of the Funder/Sponsor: The funders 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.