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.
Acevedo-Garcia D, Rosenfeld LE, Hardy E, McArdle N, Osypuk TL.Acevedo-Garcia D, et al.Am J Public Health. 2013 Oct;103(10):1754-63. doi: 10.2105/AJPH.2012.300986. Epub 2013 Feb 14.Am J Public Health. 2013.PMID: 23409880Free PMC article.