[1] Simon Fraser Univ, Fac Hlth Sci, Burnaby, BC V5A 1S6, Canada
[2] Providence Hlth Care, Div Cardiol, Vancouver, BC, Canada
[3] Providence Hlth Care, Ctr Hlth Evaluat & Outcome Sci, Vancouver, BC, Canada
[4] Univ British Columbia, Sch Populat & Publ Hlth, Vancouver, BC V5Z 1M9, Canada
[5] Univ British Columbia, Dept Family Med, Fac Practice, Vancouver, BC V5Z 1M9, Canada
[6] Univ British Columbia, Dept Med, Fac Practice, Vancouver, BC, Canada
[7] Univ No British Columbia, Sch Nursing, Vancouver, BC, Canada