An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Kornfield SL, Kang-Yi CD, Mandell DS, Epperson CN.Kornfield SL, et al.Matern Child Health J. 2018 Feb;22(2):226-236. doi: 10.1007/s10995-017-2394-9.Matern Child Health J. 2018.PMID: 29143169Free PMC article.