Accepted for Publication: January 11, 2015.
Published Online: March 2, 2015. doi:10.1001/jamapediatrics.2015.63.
Study concept and design: Williams, Ribisl.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Williams, Derrick.
Critical revision of the manuscript for important intellectual content: Williams, Ribisl.
Statistical analysis: Derrick.
Obtained funding: Williams, Ribisl.
Administrative, technical, or material support: Williams.
Study supervision: Williams.
Conflict of Interest Disclosures: Dr Ribisl has served as an expert consultant in litigation against tobacco companies. No other disclosures were reported.
Funding/Support: Research reported in this publication was supported by grant 5R01CA169189-02 from the National Cancer Institute and the US Food and Drug Administration Center for Tobacco Products.
Role of the Funder/Sponsor: The National Cancer Institute 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.
Disclaimer: The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health or the US Food and Drug Administration.
Corrections: This article was corrected on March 9, 2015, for a change made in Funding/Support and a Disclaimer addition and on March 16, 2015, for a change in wording in the Results section.