1. Contraception and Abortion Research Team of the Women’s Health Research Institute, UBC, and of the Collaboration for Outcomes Research and Evaluation
2. Department of Obstetrics and Gynecology, University of British Columbia, Vancouver
3. Centre for Health Evaluation and Outcome Sciences, Providence Health Care Research, Vancouver, British Columbia
4. Department of Family Practice, University of British Columbia, Vancouver
5. Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, United Kingdom