Funding for this research was provided by:
National Institutes of Health (R01 HD 034568, UG3OD023286)
Received: 15 May 2018
Accepted: 3 December 2018
First Online: 17 December 2018
Ethics approval and consent to participate
: The institutional review board of Harvard Pilgrim Health Care approved this study and all procedures were in accordance with the ethical standards for human experimentation established by the Declaration of Helsinki. All women provided written informed consent at enrollment and each postnatal follow-up visit and children provided assent at the early adolescent visit.
: Not applicable.
: The authors declare that they have no competing interests.
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