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.
Santos A, Martins MJ, Guimarães JT, Severo M, Azevedo I.Santos A, et al. Among authors: azevedo i.Rev Port Cardiol. 2010 Feb;29(2):159-72.Rev Port Cardiol. 2010.PMID: 20545244Clinical Trial.English, Portuguese.