1. Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada.
2. Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada.
3. Centre for Research on Inner City Health, St. Michael's Hospital, Toronto, Ontario, Canada.
4. Department of Obstetrics and Gynecology, St. Michael's Hospital and University of Toronto, Toronto, Ontario, Canada.
5. Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.
6. Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
7. Women's College Research Institute, Women's College Hospital, Toronto, Ontario Canada.
8. Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada.
9. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.
10. Women's Health in Women's Hands Community Health Centre, Toronto, Ontario, Canada.
11. Children's Hospital of Eastern Ontario and University of Ottawa, Ottawa, Ontario, Canada.
12. Department of Family and Community Medicine, St. Michael's Hospital and University of Toronto, Toronto, Ontario, Canada.