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.
Owen CL, Bracken-Grissom H, Stern D, Crandall KA.Owen CL, et al. Among authors: stern d.Philos Trans R Soc Lond B Biol Sci. 2015 Feb 19;370(1662):20140009. doi: 10.1098/rstb.2014.0009.Philos Trans R Soc Lond B Biol Sci. 2015.PMID: 25561670Free PMC article.