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.
Hesslein DG, Takaki R, Hermiston ML, Weiss A, Lanier LL.Hesslein DG, et al.Proc Natl Acad Sci U S A. 2006 May 2;103(18):7012-7. doi: 10.1073/pnas.0601851103. Epub 2006 Apr 20.Proc Natl Acad Sci U S A. 2006.PMID: 16627620Free PMC article.