[1] Univ Toronto, Univ Hlth Network, Toronto Gen Hosp, Dept Med Imaging,Peter Munk Cardiac Ctr, 585 Univ Ave,1 PMB 298, Toronto, ON M5G 2N2, Canada
[2] Univ Toronto, Univ Hlth Network, Toronto Gen Hosp, Div Cardiol,Peter Munk Cardiac Ctr, 585 Univ Ave,1 PMB 298, Toronto, ON M5G 2N2, Canada
[3] Univ Toronto, Univ Hlth Network, Toronto Gen Hosp, Div Mol Imaging, 585 Univ Ave,1 PMB 298, Toronto, ON M5G 2N2, Canada
[4] Univ Toronto, Univ Hlth Network, Dept Lib & Informat Serv, Toronto, ON, Canada
[5] Univ Toronto, Univ Hlth Network, Toronto Gen Hosp Res Inst, Toronto, ON, Canada
[6] Univ Ottawa, Dept Radiol & Epidemiol, Ottawa Hosp Res Inst, Clin Epidemiol Program, Ottawa, ON, Canada
[7] Univ Toronto, Div Resp Med, Sinai Hlth Syst, Toronto, ON, Canada
[8] Univ Sydney, Concord Hosp Clin Sch, Dept Radiol, Sydney, NSW, Australia