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.
Ofori-Asenso R, Agyeman AA, Laar A, Boateng D.Ofori-Asenso R, et al.BMC Public Health. 2016 Dec 9;16(1):1239. doi: 10.1186/s12889-016-3901-4.BMC Public Health. 2016.PMID: 27938360Free PMC article.Review.