1 University of British Columbia, Department of Obstetrics & Gynaecology, Faculty of Medicine, Suite 930, 1125 Howe Street, Vancouver, BC V6Z 2K8, Canada. Electronic address: mcchan@ualberta.ca.
2 University of Michigan-Dearborn, College of Education, Health, and Human Services, Health & Human Services, College-Wide Programs, United States.
3 University of British Columbia, Department of Obstetrics & Gynaecology, Canada.