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.
Valero J, España J, Parra-Damas A, Martín E, Rodríguez-Álvarez J, Saura CA.Valero J, et al. Among authors: saura ca.PLoS One. 2011 Feb 9;6(2):e16832. doi: 10.1371/journal.pone.0016832.PLoS One. 2011.PMID: 21347380Free PMC article.