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.
Jones CP, Cantara WA, Olson ED, Musier-Forsyth K.Jones CP, et al. Among authors: cantara wa.Proc Natl Acad Sci U S A. 2014 Mar 4;111(9):3395-400. doi: 10.1073/pnas.1319658111. Epub 2014 Feb 18.Proc Natl Acad Sci U S A. 2014.PMID: 24550473Free PMC article.