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.
Richard FJ, Dejean A, Lachaud JP.Richard FJ, et al.C R Biol. 2004 May;327(5):509-17. doi: 10.1016/j.crvi.2004.03.002.C R Biol. 2004.PMID: 15255481Free article.