Author Contributions: Dr Popescu had full access to all of 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: Popescu, Vaughan-Sarrazin, Rosenthal.
Acquisition of data: Rosenthal.
Analysis and interpretation of data: Popescu, Vaughan-Sarrazin, Rosenthal.
Drafting of the manuscript: Popescu, Vaughan-Sarrazin
Critical revision of the manuscript for important intellectual content: Popescu, Vaughan-Sarrazin, Rosenthal.
Statistical analysis: Popescu, Vaughan-Sarrazin, Rosenthal.
Obtained funding: Rosenthal.
Financial Disclosures: None reported.
Funding/Support: For data acquisition, management, and analysis, this research was supported, in part, by an award (HFP 04-149 to Dr Vaughan-Sarrazin) from the Health Services Research and Development Service, Veterans Health Administration, Department of Veterans Affairs. Dr Rosenthal is a Senior Quality Scholar, Office of Academic Affiliation, Veterans Health Administration.
Role of the Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.
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.