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.
Szwarcwald CL, da Mota JC, Damacena GN, Pereira TG.Szwarcwald CL, et al. Among authors: damacena gn.Am J Public Health. 2011 Mar;101(3):517-23. doi: 10.2105/AJPH.2010.195453. Epub 2011 Jan 13.Am J Public Health. 2011.PMID: 21233437Free PMC article.