[1] Univ Toronto, Dept Med, Div Emergency Med, Toronto, ON, Canada
[2] Univ Toronto, Dept Family & Community Med, Div Emergency Med, Toronto, ON M5S 1A1, Canada
[3] Univ Addis Ababa, Dept Med, Addis Ababa, Ethiopia
[4] Univ Addis Ababa, Dept Obstet & Gynecol, Addis Ababa, Ethiopia