[1] Univ Calgary, Cumming Sch Med, Dept Family Med, Calgary, AB, Canada
[2] Univ Calgary, Cumming Sch Med, Dept Crit Care Med, Calgary, AB, Canada
[3] Univ Calgary, Cumming Sch Med, Dept Surg, Calgary, AB, Canada
[4] Univ Calgary, Cumming Sch Med, Dept Oncol, Calgary, AB, Canada
[5] Queens Univ Belfast, Med Educ, Belfast, Antrim, North Ireland
[6] Maastricht Univ, Maastricht, Netherlands