Author Contributions: Drs Tal and Wansink had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Tal.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Tal.
Administrative, technical, or material support: Zuckerman, Wansink.
Study supervision: Zuckerman, Wansink.
Published Online: September 1, 2014. doi:10.1001/jamainternmed.2014.4098.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was made possible by support from Cornell University.
Role of the Sponsor: The sponsor 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: Sarah McIvennie, BS, and Rebecca Harrison, BS (Cornell University), helped with background research, Colin Payne, PhD (New Mexico State University), helped with data collection, and Rosemarie Hanson, BS (Cornell University), provided editorial assistance. There was no financial compensation for the contributions.