[1] Univ British Columbia, Dept Emergency Med, Vancouver, BC, Canada
[2] Vancouver Gen Hosp, Dept Emergency Med, Vancouver, BC, Canada
[3] Univ Calgary, Dept Emergency Med, Calgary, AB, Canada
[4] Univ Manitoba, Dept Emergency Med, Winnipeg, MB, Canada
[5] Univ Ottawa, Dept Emergency Med, Ottawa, ON, Canada
[6] Univ Toronto, Dept Med, Div Emergency Med, Toronto, ON, Canada
[7] Univ Western Ontario, Schulich Sch Med & Dent, Dept Emergency Med, London, ON, Canada
[8] St John Regional Hosp, Dept Emergency Med, St John, NB, Canada
[9] Dalhousie Univ New Brunswick, Dept Emergency Med, St John, NB, Canada
[10] McMaster Univ, Dept Med, Div Emergency Med, Hamilton, ON, Canada
[11] Univ Saskatchewan, Dept Emergency Med, Saskatoon, SK, Canada
[12] Mem Univ Newfoundland, Dept Emergency Med, St John, NF, Canada
[13] Univ Montreal, Dept Family & Emergency Med, Montreal, PQ, Canada
[14] Univ Laval, Dept Emergency Med, Quebec City, PQ, Canada