Accepted for Publication: December 4, 2012.
Published Online: May 13, 2013. doi:10.1001/jamainternmed.2013.6163
Study concept and design: Urban, Lichtenstein, Gary, Fierstein, and Roberts.
Acquisition of data: Urban, Gary, Fierstein, Equi, and Kussmaul.
Analysis and interpretation of data: Urban, Lichtenstein, Equi, Dallal, and Roberts.
Drafting of the manuscript: Urban, Lichtenstein, Gary, Fierstein, and Roberts.
Critical revision of the manuscript for important intellectual content: Urban, Lichtenstein, Gary, Fierstein, Equi, Kussmaul, Dallal, and Roberts.
Statistical analysis: Urban, Equi, and Dallal.
Obtained funding: Lichtenstein and Roberts.
Administrative, technical, and material support: Urban, Lichtenstein, Gary, Fierstein, Equi, Kussmaul, and Roberts.
Study supervision: Urban, Lichtenstein, and Roberts.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the US Department of Agriculture under agreements 58-1950-0-0014 and 1950-51000-072-02S with Tufts University.
Disclaimer: Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the US Department of Agriculture.
Additional Contributions: Tyler Lewtan (a high school intern at the Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging) helped with bomb calorimetry and data entry and received no compensation.