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.
Manikkam M, Guerrero-Bosagna C, Tracey R, Haque MM, Skinner MK.Manikkam M, et al. Among authors: tracey r.PLoS One. 2012;7(2):e31901. doi: 10.1371/journal.pone.0031901. Epub 2012 Feb 28.PLoS One. 2012.PMID: 22389676Free PMC article.