Author Contributions: Dr Scheuner 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: Scheuner, Sieverding, Shekelle.
Acquisition of data: Scheuner.
Analysis and interpretation of data: Scheuner, Shekelle.
Drafting of the manuscript: Scheuner, Sieverding, Shekelle.
Critical revision of the manuscript for important intellectual content: Scheuner, Shekelle.
Obtained funding: Sieverding, Shekelle.
Study supervision: Shekelle.
Financial Disclosures: None reported.
Funding/Support: This work was funded by the Department of Veterans Affairs, Veterans Health Administration, Health Services Research and Development Service, and was conducted by a team that included Veterans Affairs employees.
Role of the Sponsor: Employees of the Department of Veterans Affairs were involved in the design and conduct of the study; in the analysis and interpretation of the data; and in the preparation and review of the manuscript.
Disclaimer: The opinions expressed in this article are those of the authors and do not reflect those of the Department of Veterans Affairs, the Veterans Health Administration, or the Health Services Research and Development Service.
Previous Presentations: Presented at a planning meeting of experts in health services research and genomics and Veterans Affairs policy makers in Washington, DC; September 2007.
Additional Contributions: We are grateful to Roberta Shanman (RAND Corporation), Brett Munjas (VA Greater Los Angeles Healthcare System), and David Adamson, PhD (RAND Corporation), who contributed to the completion of this article. These individuals did not receive compensation for their efforts beyond their usual salary.