1. Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.
2. Better Outcomes Registry & Network (BORN) Ontario, Ottawa, Canada.
3. Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Canada.
4. School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada.
5. Department of Obstetrics and Gynecology, University of Ottawa, Ottawa, Canada.
6. Society of Obstetricians and Gynaecologists of Canada, Ottawa, Canada.