Published Online: November 26, 2012. doi:10.1001/2013.jamainternmed.474
Author Contributions:Study concept and design: Lin and Caplan. Acquisition of data: Lin and McKenzie. Analysis and interpretation of data: Lin, McKenzie, Pell, and Caplan. Drafting of the manuscript: Lin, Pell, and Caplan. Critical revision of the manuscript for important intellectual content: Lin, McKenzie, Pell, and Caplan. Statistical analysis: Caplan. Obtained funding: Lin. Administrative, technical, and material support: McKenzie. Study supervision: Lin.
Conflict of Interest Disclosures: None reported.
Funding/Support: Dr Caplan is supported by Career Development Award (07-221) from the Department of Veterans Affairs, Health Services Research & Development Service.
Disclaimer: The views expressed in this article are those of the authors and do not necessarily reflect the position or policy of the Department of Veterans Affairs.