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.
Cabrera-Guerra Y, Pascual-Pedreño A, Hernández-Martínez A, Mayorga-Campo M, Martínez-Bermejo MT, Bueno-Pacheco G.Cabrera-Guerra Y, et al.Rev Calid Asist. 2010 Jul-Aug;25(4):193-9. doi: 10.1016/j.cali.2009.12.002. Epub 2010 Jan 27.Rev Calid Asist. 2010.PMID: 20106693Clinical Trial.Spanish.