[1] Univ Toronto, Div Cardiol, Dept Med, Univ Hlth Network, Toronto, ON, Canada
[2] Univ Ottawa, Div Cardiol, Inst Heart, Ottawa, ON, Canada
[3] Canadian Cardiovasc Soc, Ottawa, ON, Canada
[4] Dalhousie Univ, Dept Community Hlth & Epidemiol, Div Cardiol, Dept Med, Halifax, NS, Canada