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.
Caballero A, Quesada H.Caballero A, et al. Among authors: quesada h.Mol Biol Evol. 2010 May;27(5):1139-51. doi: 10.1093/molbev/msq001. Epub 2010 Jan 7.Mol Biol Evol. 2010.PMID: 20056690