[1] Dept Family Med, Hamilton, ON, Canada
[2] Univ Lincoln, Lincoln Sch Hlth & Social Care, Lincoln, England
[3] Hamilton Paramed Serv, Hamilton, ON, Canada
[4] East Midlands Ambulance Serv NHS Trust, Lincoln, England
[5] Niagara Emergency Med Serv, Niagara, ON, Canada
[6] McMaster Univ, Dept Family Med, Hamilton, ON, Canada
[7] Univ Lincoln, Lincoln, England