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.
Kuhl PK, Conboy BT, Coffey-Corina S, Padden D, Rivera-Gaxiola M, Nelson T.Kuhl PK, et al. Among authors: padden d.Philos Trans R Soc Lond B Biol Sci. 2008 Mar 12;363(1493):979-1000. doi: 10.1098/rstb.2007.2154.Philos Trans R Soc Lond B Biol Sci. 2008.PMID: 17846016Free PMC article.