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.
Averbeck BB, Chafee MV, Crowe DA, Georgopoulos AP.Averbeck BB, et al. Among authors: crowe da.Proc Natl Acad Sci U S A. 2002 Oct 1;99(20):13172-7. doi: 10.1073/pnas.162485599. Epub 2002 Sep 19.Proc Natl Acad Sci U S A. 2002.PMID: 12242330Free PMC article.