1. Department of Health Sciences, McMaster University, Hamilton, Ontario, Canada L8N 3Z5
2. Department of Health Research Methodology, McMaster University, 1200 Main St. West, Hamilton, Ontario, Canada L8N 3Z5
3. Division of Maternal‐Fetal Medicine, Departments of Obstetrics & Gynecology, Diagnostic Imaging, and Clinical Epidemiology & Biostatistics, McMaster University, 1200 Main St. West, Hamilton, Ontario, Canada L8N 3Z5