Author Contributions: Study concept and design: Wald, Hackam, Gomes, Juurlink, Garg, Kitchlu, Mamdani, and Yan. Acquisition of data: Juurlink and Kitchlu. Analysis and interpretation of data: Bajaj, Wald, Hackam, Gomes, Perl, Manno, Kitchlu, Mamdani, and Yan. Drafting of the manuscript: Bajaj and Kitchlu. Critical revision of the manuscript for important intellectual content: Bajaj, Wald, Hackam, Gomes, Perl, Juurlink, Manno, Garg, Kitchlu, Mamdani, and Yan. Statistical analysis: Gomes, Juurlink, Manno, Kitchlu, and Mamdani. Obtained funding: Juurlink. Administrative, technical, and material support: Gomes, Kitchlu, and Mamdani. Study supervision: Wald and Yan.
Financial Disclosure: None reported.
Funding/Support: Dr Yan is supported by a New Investigator Award from the Heart and Stroke Foundation of Canada.
This article was corrected for errors on May 14, 2012.