1. Institute for Clinical Evaluative Sciences; Toronto Ontario Canada
2. Institute of Health Management, Policy, and Evaluation; University of Toronto; Toronto Canada
3. Schulich Heart Research Program; Sunnybrook Research Institute; Toronto Canada
4. Department of Medicine; University of Toronto; Toronto Canada
5. Division of Cardiology, Department of Medicine; University Health Network; Toronto Canada
6. Department of Mathematics and Statistics; Boston University; Boston MA U.S.A.
7. Harvard Clinical Research Institute; Harvard University; Boston MA U.S.A.
8. Department of Biostatistics; University of North Carolina; Chapel Hill NC U.S.A.
9. Department of Statistics and Operations Research; University of North Carolina; Chapel Hill NC U.S.A.