1. Centre for Research on Inner City Health; St. Michael's Hospital; St. Michael's Hospital; Toronto Ontario Canada
2. Dalla Lana School of Public Health; University of Toronto; Toronto Ontario Canada
3. The Institute for Clinical Evaluative Sciences; Toronto Ontario Canada
4. Departments of Medicine and Obstetrics and Gynaecology; St. Michael's Hospital; Toronto Ontario Canada
5. Centre for Health Equity Studies (CHESS); Karolinska Institutet/Stockholm University; Stockholm Sweden