1. Department of Health and Society, University of Toronto Scarborough, Toronto, Ontario, Canada.
2. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
3. Women's College Research Institute, Women's College Hospital, Toronto, Ontario, Canada.
4. Lurie Institute for Disability Policy, Heller School for Social Policy and Management, Brandeis University, Waltham, Massachusetts, USA.