1. Department of Obstetrics and Gynecology, University of Calgary , Calgary, Alberta , Canada
2. Department of Family Medicine, McMaster University , Hamilton, Ontario , Canada
3. Department of Anesthesia, McMaster University , Hamilton, Ontario , Canada
4. Department of Health Research Methods, Evidence, and Impact, McMaster University , Hamilton, Ontario , Canada
5. The Research Institute, St. Joseph’s Healthcare , Hamilton, Ontario , Canada
6. Department of Obstetrics and Gynecology, Faculty of Health Sciences, McMaster University , Hamilton, Ontario , Canada