[1] Dalhousie Univ, Sch Med, Halifax, NS, Canada
[2] Nova Scotia Trauma Program, Halifax, NS, Canada
[3] Dalhousie Univ Lib, Halifax, NS, Canada
[4] Dalhousie Univ, Fac Med, Dept Emergency Med, Halifax, NS, Canada
[5] Dalhousie Univ, Fac Med, Dept Crit Care, Halifax, NS, Canada
[6] St Michaels Hosp, Div Gen Surg, Unity Hlth Toronto, Toronto, ON, Canada