[1] Univ Calgary, Dept Med, Libin Cardiovasc Inst, Calgary, AB, Canada
[2] Univ Calgary, Dept Pharmacol & Therapeut, Libin Cardiovasc Inst, Calgary, AB, Canada
[3] Mem Univ Newfoundland, Fac Med, Div Basic Med Sci, St John, NF A1B 3V6, Canada
[4] Mem Univ Newfoundland, Fac Med, Div Basic Med Sci, Labrador City, NF, Canada
[5] Univ Calgary, Dept Cardiac Sci, Libin Cardiovasc Inst, Calgary, AB, Canada
[6] McMaster Univ, Div Cardiol, Hamilton, ON, Canada
[7] Dalhousie Univ, Div Cardiol, Halifax, NS, Canada