1. Occupational and Environmental Health Dalla Lana School of Public Health, University of Toronto Toronto Ontario Canada
2. Department of Medicine University of Toronto Toronto Ontario Canada
3. Division of Occupational Medicine, Department of Medicine St Michael's Hospital, Unity Health Toronto Toronto Ontario Canada
4. MAP Centre for Urban Health Solutions, St Michael's Hospital, Unity Health Toronto Toronto Ontario Canada
5. Occupational Medicine Clinic, St Michael's Hospital, Unity Health Toronto Toronto Ontario Canada