Author Contributions: Dr Shaneyfelt 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: Shaneyfelt, Green.
Acquisition of data: Shaneyfelt, Baum, Bell, Feldstein, Kaatz, Whelan, Green.
Analysis and interpretation of data: Shaneyfelt, Houston, Green.
Drafting of the manuscript: Shaneyfelt, Green.
Critical revision of the manuscript for important intellectual content: Shaneyfelt, Baum, Bell, Feldstein, Houston, Kaatz, Whelan, Green.
Statistical analysis: Shaneyfelt, Houston, Green.
Administrative, technical, or material support: Shaneyfelt, Bell, Green.
Study supervision: Shaneyfelt, Green.
Financial Disclosures: None reported.
Disclaimer: Drs Baum and Green have published articles that were included as part of this review. Neither abstracted data from their own published works.
Acknowledgment: This study was conducted as a charge of the Society of General Internal Medicine Evidence-Based Medicine Task Force, of which 3 authors (Drs Shaneyfelt, Whelan, and Green) are members. We thank Heather Coley, MPH, Department of Medicine, University of Alabama School of Medicine, for her assistance in compiling data on the citation of articles in various electronic databases.