[1] Univ Western Ontario, Elborn Coll, London, ON, Canada
[2] Univ Toronto, St Michaels Hosp, Dept Med, Stroke Program, Toronto, ON M5B 1W8, Canada
[3] Univ Toronto, Dept Hlth Policy Management & Evaluat, Toronto, ON, Canada
[4] Li Ka Shing Knowledge Inst, Toronto, ON, Canada