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.
dos Santos JP, Paes NA.dos Santos JP, et al. Among authors: paes na.Rev Bras Epidemiol. 2014 Apr-Jun;17(2):407-20. doi: 10.1590/1809-4503201400020010eng.Rev Bras Epidemiol. 2014.PMID: 24918413Free article.English, Portuguese.