Published Online: April 25, 2011. doi:10.1001/archinternmed.2011.141. This article was corrected for a typographical error on May 27, 2011.
Author Contributions: Study concept and design: Groeneveld, Polsky, and Epstein. Acquisition of data: Groeneveld, Polsky, and Epstein. Analysis and interpretation of data: Groeneveld, Polsky, F. Yang, L. Yang, and Epstein. Drafting of the manuscript: Groeneveld, Polsky, and Epstein. Critical revision of the manuscript for important intellectual content: Groeneveld, Polsky, F. Yang, L. Yang, and Epstein. Statistical analysis: Groeneveld, Polsky, F. Yang, L. Yang, and Epstein. Obtained funding: Groeneveld. Study supervision: Groeneveld.
Financial Disclosure: None reported.
Funding/Support: This research was supported by the National Heart, Lung, and Blood Institute (grant 1R01HL086919) and by the Agency for Healthcare Research and Quality (grant 1R01HS018403). Dr Groeneveld was additionally supported by a Career Development Transition Award from the Department of Veterans Affairs' Health Services Research and Development Service, Washington, DC. This project was also funded, in part, under a grant from the Pennsylvania Department of Health, which specifically disclaims responsibility for any analyses, interpretations, or conclusions.
Previous Presentation: This study was presented orally at the American Heart Association Quality of Care and Outcomes Forum; May 20, 2010; Washington, DC.