Published Online: February 4, 2013. doi:10.1001 /jamainternmed.2013.2002. Corrected March 11, 2013.
Author Contributions:Study concept and design: Forster. Acquisition of data: Forster. Analysis and interpretation of data: Forster and Auger. Drafting of the manuscript: Forster and Auger. Critical revision of the manuscript for important intellectual content: Forster and Auger. Statistical analysis: Forster. Obtained funding: Forster. Study supervision: Forster and Auger; Research coordination: Auger.
The ISTOP ADE Investigators: Alan J. Forster, MD, MSc; Natalie Oake, MSc; Claudine Auger, PhD; Maria Ali, MD; David Buckeridge, MD, PhD; Tewodros Eguale, MD, PhD; Carl van Walraven, MD, MSc; and Robyn Tamblyn, PhD.
Conflict of Interest Disclosures: None reported.
Funding/Support: Research for this article was supported by grant MOP 97843 from The Canadian Institute for Health Research.
Role of the Sponsor: None of the funders were involved in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, and approval of the manuscript.