Accepted for Publication: September 1, 2012.
Published Online: February 11, 2013. doi:10.1001/jamainternmed.2013.2522
Author Contributions: Both authors had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Nguyen and Bero. Acquisition of data: Nguyen. Analysis and interpretation of data: Nguyen and Bero. Drafting of the manuscript: Nguyen and Bero. Critical revision of the manuscript for important intellectual content: Nguyen. Administrative, technical, and material support: Nguyen. Study supervision: Bero.
Conflict of Interest Disclosures: None reported.
Online-Only Material: Listen to an author interview about this article, and others, at http://bit.ly/OSqSNt.
Additional Information: Dr Nguyen was a UCSF pharmacy student at the time this work was conducted.
Additional Contributions: Donna Odierna, DrPH, and Dorie Apollonio, PhD, of UCSF, and Trudo Lemmons, LLM, DCL, of the University of Toronto, reviewed an earlier version of the manuscript.
This article was corrected for errors on March 13, 2013.