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.
Galbraith CG, Sheetz MP.Galbraith CG, et al.Proc Natl Acad Sci U S A. 1997 Aug 19;94(17):9114-8. doi: 10.1073/pnas.94.17.9114.Proc Natl Acad Sci U S A. 1997.PMID: 9256444Free PMC article.