1. Department of Obstetrics and Gynecology, Medicine, and Community Health Sciences University of Calgary Calgary Alberta Canada
2. Department of Obstetrics and Gynecology University of Calgary Calgary Alberta Canada
3. Department of Obstetrics and Gynecology University of Toronto Toronto Ontario Canada
4. SickKids Research Institute and IC/ES Toronto Ontario Canada
5. Department of Oncology and Community Health Sciences University of Calgary Calgary Alberta Canada
6. Cancer Research and Analytics, Cancer Care Alberta Alberta Health Services Calgary Alberta Canada
7. Department of Cancer Epidemiology and Prevention Research, Cancer Care Alberta Alberta Health Services Calgary Alberta Canada
8. Department of Community Health Sciences University of Calgary Calgary Alberta Canada
9. Surveillance and Reporting Alberta Health Services Calgary Alberta Canada
10. Department of Obstetrics and Gynecology University of British Columbia Vancouver British Columbia Canada
11. Werklund School of Education University of Calgary Calgary Alberta Canada
12. Cancer Control Research, BC Cancer Vancouver British Columbia Canada
13. School of Epidemiology and Public Health University of Ottawa Ottawa Ontario Canada
14. IC/ES Toronto Canada