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.
Keeling CI, Weisshaar S, Lin RP, Bohlmann J.Keeling CI, et al. Among authors: bohlmann j.Proc Natl Acad Sci U S A. 2008 Jan 22;105(3):1085-90. doi: 10.1073/pnas.0709466105. Epub 2008 Jan 15.Proc Natl Acad Sci U S A. 2008.PMID: 18198275Free PMC article.