[1] Queen’s University,Department of Obstetrics and Gynecology
[2] Kingston General Hospital,Department of Public Health Sciences
[3] Queen’s University,Knowledge Synthesis Group, Ottawa Methods Centre
[4] Ottawa Hospital Research Institute,Department of Obstetrics, Gynecology & Newborn Care
[5] The Ottawa Hospital,OMNI Research Group, Clinical Epidemiology Program
[6] University of Ottawa,School of Epidemiology, Public Health and Preventive Medicine
[7] Ottawa Hospital Research Institute,undefined
[8] University of Ottawa,undefined