Accepted for Publication: December 19, 2011.
Author Contributions: Dr Coca had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Coca, Haq, and Parikh. Acquisition of data: Coca, Haq, and Parikh. Analysis and interpretation of data: Coca, Ismail-Beigi, Haq, Krumholz, and Parikh. Drafting of the manuscript: Coca, Haq, and Parikh. Critical revision of the manuscript for important intellectual content: Coca, Ismail-Beigi, Haq, Krumholz, and Parikh. Statistical analysis: Coca, Haq, and Parikh. Administrative, technical, and material support: Coca. Study supervision: Coca and Parikh.
Financial Disclosure: Dr Krumholz chairs a scientific advisory board for United Healthcare.
Funding/Support: Dr Krumholz is supported by grant U01 HL105270-02 (Center for Cardiovascular Outcomes Research at Yale University) from the National Heart, Lung, and Blood Institute and is the recipient of a research grant from Medtronic, Inc, through Yale University.
Additional Contributions: Mark Gentry, MA, MLS, Yale University School of Medicine Library, assisted with our search of the medical literature. Mr Gentry received no financial compensation.
This article was corrected for errors on June 14, 2012.