Published Online: September 8, 2014. doi:10.1001/jamainternmed.2014.4506.
Study concept and design: McDonald, Weissman, Goodwin, Kuhn.
Acquisition, analysis, or interpretation of data: McDonald, Callaghan, Weissman, Goodwin, Mundkur.
Drafting of the manuscript: McDonald, Callaghan, Weissman, Goodwin, Kuhn.
Critical revision of the manuscript for important intellectual content: McDonald, Callaghan, Weissman, Goodwin, Mundkur.
Statistical analysis: McDonald, Callaghan, Weissman. Obtained funding: McDonald.
Administrative, technical, or material support: McDonald, Weissman, Goodwin, Mundkur, Kuhn.
Study supervision: McDonald.
Conflict of Interest Disclosures: None reported.
Funding/Support: This research was supported in part by the Intramural Research Program of the National Institutes of Health and National Library of Medicine (NIH-NLM), and the American College of Physicians (ACP).
Role of the Sponsor: The NIH-NLM and the ACP had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the ACP, NIH-NLM, or the US Department of Health and Human Services.