Accepted for Publication: August 12, 2011.
Author Contributions:Study concept and design: Levine, Houston, Johnson-Roe, Allison, and Kiefe. Acquisition of data: Houston, Gerald, Johnson-Roe, and Kiefe. Analysis and interpretation of data: Levine, Funkhouser, Houston, Gerald, Allison, Richman, and Kiefe. Drafting of the manuscript: Levine, Funkhouser, Houston, Gerald, and Richman. Critical revision of the manuscript for important intellectual content: Houston, Gerald, Johnson-Roe, Allison, Richman, and Kiefe. Statistical analysis: Levine, Funkhouser, Allison, Richman, and Kiefe. Obtained funding: Houston, Allison, and Kiefe. Administrative, technical, and material support: Levine, Gerald, and Johnson-Roe.
Financial Disclosure: None reported.
Funding/Support: This study was supported by grant IHD-04-387 from the VA Health Services Research and Development office and grant R01 HL70786-02 from the National Institutes of Health for a parallel study.