Department of Obstetrics and Gynaecology, University of British Columbia and the Children’s and Women’s Hospital and Health Centre of British Columbia, Vancouver, British Columbia, Canada 

 School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada 

 Faculty of Medicine, Department of Pediatrics, Université Laval and Centre Hospitalier Universitaire de Québec-Université Laval Research Center, Québec City, Canada 

 Departments of Obstetrics and Gynecology and Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada 

 Division of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden 

 Department of Obstetrics and Gynaecology, University of British Columbia and the Children’s and Women’s Hospital and Health Centre of British Columbia, Vancouver, British Columbia, Canada 

 Department of Medicine, The University of British Columbia, Vancouver, British Columbia, Canada 

 Perinatal Epidemiology Research Unit, Departments of Obstetrics and Gynaecology and Pediatrics, Dalhousie University, Halifax, Nova Scotia, Canada 

 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, New York University Grossman School of Medicine, New York, NY 

 Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 

 Division of Epidemiology and Biostatistics, Department of Obstetrics, Gynecology, and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 

 Cardiovascular Institute of New Jersey and Department of Medicine, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 

 Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ 

 Environmental and Occupational Health Sciences Institute, Rutgers Robert Wood Johnson Medical School, Piscataway, NJ