1. From the Institute for Clinical Evaluative Sciences, Toronto, Canada (M.V.H., P.C.A., X.W., J.V.T., D.S.L.); Department of Medicine, Ottawa Heart Institute, Ottawa, Canada (P.P.L.); Institute for Health Policy, Management, and Evaluation, Toronto, Canada (P.C.A., J.V.T., D.S.L.); Peter Munk Cardiac Centre, University Health Network, Toronto, Canada (H.J.R., G.E.N., D.S.L.); Mt. Sinai Hospital, Toronto, Canada (G.E.N.); Sunnybrook Health Sciences Centre, Toronto, Canada (J.V.T.); and Department of...