[1] McMaster Univ, Dept Med, Juravinski Hosp Room A3-20,711 Concess St, Hamilton, ON L8V 1C1, Canada
[2] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[3] Hamilton Hlth Sci, Hamilton, ON, Canada
[4] Vancouver Isl Hlth Author, Victoria, BC, Canada
[5] Ottawa Hosp, Dept Clin & Org Eth, Ottawa, ON, Canada
[6] Ottawa Hosp, Ottawa, ON, Canada
[7] McMaster Univ, Dept Med, Div Emergency Med, Hamilton, ON, Canada
[8] London Sch Hyg & Trop Med, London, England
[9] Univ British Columbia, Dept Family Med, Vancouver, BC, Canada
[10] McMaster Univ, Dept Family Med, Hamilton, ON, Canada