Published Online: January 5, 2015. doi:10.1001/jamainternmed.2014.6936.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Flory.
Critical revision of the manuscript for important intellectual content: Hennessy.
Statistical analysis: Flory.
Conflict of Interest Disclosures: Dr Hennessy reports consulting for Abbott Laboratories, Hoffmann-La Roche Ltd, Novartis Pharmaceuticals, Bayer Healthcare LLC, AstraZeneca, and Bristol-Myers Squibb; receiving research support from AstraZeneca and Bristol-Myers Squibb; and receiving institutional support from Pfizer Inc and Sanofi to support pharmacoepidemiology training. No other disclosures were reported.