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.
Collins RF, Beis K, Dong C, Botting CH, McDonnell C, Ford RC, Clarke BR, Whitfield C, Naismith JH.Collins RF, et al. Among authors: clarke br.Proc Natl Acad Sci U S A. 2007 Feb 13;104(7):2390-5. doi: 10.1073/pnas.0607763104. Epub 2007 Feb 5.Proc Natl Acad Sci U S A. 2007.PMID: 17283336Free PMC article.
King JD, Berry S, Clarke BR, Morris RJ, Whitfield C.King JD, et al. Among authors: clarke br.Proc Natl Acad Sci U S A. 2014 Apr 29;111(17):6407-12. doi: 10.1073/pnas.1400814111. Epub 2014 Apr 14.Proc Natl Acad Sci U S A. 2014.PMID: 24733938Free PMC article.