aInstitute for Work and Health, 481 University Avenue, Suite 800, Toronto, Ont., Canada M5G 2E9
bDepartment of Public Health Sciences, University of Toronto, Toronto, Ont., Canada
cDivision of Outcomes & Population Health, Toronto Western Hospital Research Institute, University Health Network, Toronto, Ont., Canada
dDepartment of Public Health Sciences and the Alberta Centre for Injury Control and Research, University of Alberta, Edmonton, Alta., Canada
*Corresponding author. Tel.: +1 416 927 2027.
E-mail: [email protected]
Submitted April 12, 2004; revised August 24, 2004; accepted September 1, 2004.