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.
Kirby RR, Johns DG, Lindley JA.Kirby RR, et al. Among authors: lindley ja.Biol Lett. 2006 Dec 22;2(4):597-600. doi: 10.1098/rsbl.2006.0530.Biol Lett. 2006.PMID: 17148298Free PMC article.