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.
Hardelin JP, Levilliers J, del Castillo I, Cohen-Salmon M, Legouis R, Blanchard S, Compain S, Bouloux P, Kirk J, Moraine C, et al.Hardelin JP, et al.Proc Natl Acad Sci U S A. 1992 Sep 1;89(17):8190-4. doi: 10.1073/pnas.89.17.8190.Proc Natl Acad Sci U S A. 1992.PMID: 1518845Free PMC article.