Departments of Epidemiology and Social and Behavioral Sciences, Harvard School of Public Health, and the Departments of Pediatric Newborn Medicine and Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts; the Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, British Columbia, Canada; and Magee-Women's Research Institute, Departments of Obstetrics, Gynecology, and Reproductive Sciences and Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania.
Corresponding author: Laura Schummers, SM, Department of Epidemiology, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115; e-mail: [email protected].
Supported by the Child and Family Research Institute at the BC Children's and Women's Hospital, University of British Columbia. Ms. Schummers holds a Leadership Trainee Award from the Maternal-Child Health Bureau and was supported by Training Grant T32HD060454 in Reproductive, Perinatal and Pediatric Epidemiology from the Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health. Dr. Hutcheon holds New Investigator awards from the Canadian Institutes of Health Research and the Michael Smith Foundation for Health Research. Dr. Himes is supported by National Institutes of Health Grants K12HD063087.
Presented as a poster at the 34th annual meeting of the Society for Maternal-Fetal Medicine, February 3–8, 2014, New Orleans, Louisiana, and at the Society for Epidemiologic Research annual meeting, June 24–27, 2014, Seattle, Washington.
The authors thank Terri Pacheco, Perinatal Services British Columbia, for her assistance in compiling the study data.
All inferences, opinions, and conclusions drawn in this publication are those of the authors and do not reflect the opinions or policies of Perinatal Services BC.
Financial Disclosure The authors did not report any potential conflicts of interest.
