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.
Eldred JA, Dawes LJ, Wormstone IM.Eldred JA, et al. Among authors: dawes lj.Philos Trans R Soc Lond B Biol Sci. 2011 Apr 27;366(1568):1301-19. doi: 10.1098/rstb.2010.0341.Philos Trans R Soc Lond B Biol Sci. 2011.PMID: 21402588Free PMC article.Review.