Accepted for Publication: December 31, 2012.
Published Online: February 11, 2013. doi:10.1001/jamainternmed.2013.460
Author Contributions:Study concept and design: Rosenthal and Cram. Acquisition of data: Rosenthal. Analysis and interpretation of data: Rosenthal and Lu. Drafting of the manuscript: Rosenthal, Lu, and Cram. Critical revision of the manuscript for important intellectual content: Rosenthal, Lu, and Cram. Statistical analysis: Rosenthal, Lu, and Cram. Administrative, technical, and material support: Cram. Study supervision: Cram.
Conflict of Interest Disclosures: Dr Cram is supported by a K24 award (AR062133) from the National Institute of Arthritis and Musculoskeletal and Skin Diseases and by the Department of Veterans Affairs.
Funding/Support: This work is funded in-part by grants R01 HL085347 from the National Heart, Lung, and Blood Institute and R01 AG033035 from the National Institute on Aging at the National Institutes of Health.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily represent the views of the Department of Veterans Affairs.
Previous Presentation: The results presented in this article were presented at the 2012 Annual Meeting of the Society of General Internal Medicine; May 11, 2012; Orlando, Florida.