Affiliations

• ¹ Division of Maternal-Fetal Medicine, McMaster University, Hamilton, ON; Department of Obstetrics and Gynecology, McMaster University, Hamilton, ON; Department of Radiology, McMaster University, Hamilton, ON; Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON.
• ² Department of Obstetrics and Gynecology, First Affiliated Hospital of Xi'an Jiao Tong University, Shaanxi Province, People's Republic of China.
• ³ Faculty of Health Sciences, McMaster University, Hamilton, ON.
• ⁴ Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON.
• ⁵ See Appendix.
• ⁶ Department of Paediatrics, Mount Sinai Hospital and Department of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON.
• ⁷ Department of Paediatrics, Mount Sinai Hospital and Departments of Paediatrics, Obstetrics and Gynaecology, and Health Policy, Management and Evaluation, University of Toronto, ON.
• ⁸ Department of Obstetrics and Gynecology, Mount Sinai Hospital and University of Toronto, Toronto, ON.
• ⁹ Division of Maternal-Fetal Medicine, Departments of Obstetrics & Gynecology, Clinical Epidemiology & Biostatistics, and Diagnostic Imaging, McMaster University, Hamilton, ON.
• ¹⁰ Department of Obstetrics and Gynecology, McMaster University, Hamilton, ON.
• ¹¹ Faculty of Nursing, University of Alberta, Edmonton, AB.
• ¹² Faculty of Nursing, University of Calgary, Calgary, AB.
• ¹³ Dalla Lana School of Public Health, University of Toronto and Toronto Public Health, Toronto, ON.
• ¹⁴ Department of Obstetrics and Gynaecology, Dalhousie University, Halifax, NS.
• ¹⁵ McMaster University, Hamilton, ON.