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.
Edgcomb VP, Kysela DT, Teske A, de Vera Gomez A, Sogin ML.Edgcomb VP, et al. Among authors: sogin ml.Proc Natl Acad Sci U S A. 2002 May 28;99(11):7658-62. doi: 10.1073/pnas.062186399.Proc Natl Acad Sci U S A. 2002.PMID: 12032339Free PMC article.