[1] Univ Montreal Hosp Res Ctr CRCHUM, Montreal, PQ, Canada
[2] Univ Montreal, Dept Social & Prevent Med, Montreal, PQ, Canada
[3] Queens Univ, Dept Publ Hlth Sci, Kingston, ON, Canada
[4] Queens Canc Res Inst, Div Canc Care & Epidemiol, Kingston, ON, Canada