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.
Gjerstad SD, Porter D, Smith VL, Winn A.Gjerstad SD, et al.Proc Natl Acad Sci U S A. 2015 Nov 24;112(47):14557-62. doi: 10.1073/pnas.1517038112. Epub 2015 Nov 9.Proc Natl Acad Sci U S A. 2015.PMID: 26553991Free PMC article.
Oprea RD, Smith VL, Winn AM.Oprea RD, et al. Among authors: winn am.Proc Natl Acad Sci U S A. 2007 Jan 16;104(3):1093-6. doi: 10.1073/pnas.0609866104. Epub 2007 Jan 10.Proc Natl Acad Sci U S A. 2007.PMID: 17215376Free PMC article.