From the aDepartment of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA; bDepartment of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC, Canada; cDepartment of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA; dDepartment of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA; and eMaternal-Fetal Medicine Division, Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA.
Submitted July 25, 2017; accepted March 4, 2018.
Description of process by which someone else could obtain data and computing code: The data used for this study are administered by Population Data BC. Population Data BC provides access to these data for research purposes, but does not allow the data to be shared publicly in order to maintain confidentiality and privacy of individual health information. Researchers who wish to access these data may submit a data request directly to Population Data BC.
Laura Schummers was supported by National Research Service Award 1F31HD086970-01A1 from the Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, a Training Grant in Pharmacoepidemiology from the Harvard T. H. Chan School of Public Health and received a CIHR-PHAC Family Planning Public Health Chair Seed Grant to support this project. Dr. Hutcheon holds New Investigator awards from the Canadian Institutes of Health Research and the Michael Smith Foundation for Health Research.
Disclosure: The authors report no conflicts of interest.
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Correspondence: Laura Schummers, Department of Epidemiology, Harvard T.H. Chan School of Public Health, 677 Huntington Avenue, Boston, MA 02115. E-mail: [email protected].
