[1] McMaster Univ, Dept Clin Epidemiol & Biostat, Suite 101,206 James St South, Hamilton, ON L8P 3A9, Canada
[2] McMaster Univ, Dept Family Med, Hamilton, ON, Canada
[3] McMaster Univ, Dept Surg, Hamilton, ON, Canada
[4] McMaster Univ, Surg Outcomes Res Ctr SOURCE, Hamilton, ON, Canada
[5] Simon Fraser Univ, Fac Hlth Sci, Burnaby, BC, Canada
[6] Hamilton Hlth Sci, Offord Ctr Child Studies, Chedoke Site, Hamilton, ON, Canada
[7] Univ Waterloo, Fac Appl Hlth Sci, Dept Kinesiol, Waterloo, ON, Canada
[8] Inst Work & Hlth, Toronto, ON, Canada
[9] McMaster Univ, Dept Math & Stat, Hamilton, ON, Canada
[10] Occupat Hlth Clin Ontario Workers Inc, Toronto, ON, Canada
[11] Univ Montreal, Dept Social & Prevent Med, Res Ctr CR CHUM, Montreal, PQ, Canada
[12] Univ Toronto, Gage Occupat & Environm Hlth Unit, Toronto, ON, Canada
[13] Ontario Minist Labor, Toronto, ON, Canada