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Authors
Bradley, Robert H.
Pennar, Amy L.
Glick, Jennifer
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Funding
Funding for this research was provided by:
Maternal and Child Health Bureau (R40 MC25675)
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Article History
First Online: 22 June 2016
Compliance with Ethical Standards
:
: All the authors declare that they have no conflict of interest.
: The article does not contain any studies with human participants or animals performed by any of the authors. The data analyzed for this study were from a public use data set archived in the Office of Population Research at Princeton University. The data set contains no personal identifiers for study participants (see). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
