1. From the Cabrini and Epworth Healthcare Groups, Victoria, Australia (M.N.O); the Division of Cardiology, University of Western Ontario, London, Ontario (G.J.K., P.L.-S., L.J.G., A.C.S., R.Y.); University of Montreal and Montreal Heart Institute Research Center, Montreal, Quebec, Canada (S.N.); and the Division of Cardiology, University of British Columbia, Vancouver, British Columbia, Canada (A.D.K.).