1. Department of Epidemiology, Biostatistics and Occupational Health; McGill University; Montreal QC Canada
2. Department of Clinical Epidemiology & Biostatistics; McMaster University; Hamilton ON Canada
3. Centre for Evaluation of Medicines; St Joseph's Healthcare; Hamilton ON Canada
4. Biostatistics Unit; Father Sean O'Sullivan Research Centre; St Joseph's Healthcare; Hamilton ON Canada
5. Departmento de Obstetricia y Ginecologia; Escuela de Medicina; Pontificia Universidad Catolica de Chile; Santiago Chile
6. Division of General Pediatrics; Department of Pediatrics; McMaster University; Hamilton ON Canada
7. Better Outcomes Registry and Network (BORN) Ontario (formerly OPSS); Ottawa ON Canada
8. Division of Neonatology; Department of Pediatrics; McMaster University; Hamilton ON Canada
9. Division of Maternal-Fetal Medicine; Departments of Obstetrics & Gynecology and Diagnostic Imaging; McMaster University; Hamilton ON Canada