Published Online: July 22, 2013. doi:10.1001/jamainternmed.2013.8998.
Study concept and design: Combs, Caverly, Matlock.
Acquisition of data: Combs, Rappaport.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Combs, Rappaport.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Matlock.
Administrative, technical, and material support: Combs.
Study supervision: Combs.
Conflict of Interest Disclosures: None reported.
Previous Presentations: This study was presented as an abstract at the 36th Annual Meeting of the Society of General Internal Medicine; April 26, 2013; Denver, Colorado.