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.
Saavedra JM, Dattilo AM.Saavedra JM, et al. Among authors: dattilo am.Rev Peru Med Exp Salud Publica. 2012 Jul-Sep;29(3):379-85. doi: 10.1590/s1726-46342012000300014.Rev Peru Med Exp Salud Publica. 2012.PMID: 23085801Spanish.