[1] Canc Care Ontario, Pevent & Canc Control, Toronto, ON, Canada
[2] Occupat Canc Res Ctr, Toronto, ON, Canada
[3] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[4] Univ Quebec, INRS Inst Armand Frappier, Laval, PQ, Canada
[5] Univ Ottawa, Dept Epidemiol & Community Med, Ottawa, ON, Canada
[6] Carleton Univ, Ottawa, ON K1S 5B6, Canada