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.
Hassett DJ, Cohen MS.Hassett DJ, et al. Among authors: cohen ms.FASEB J. 1989 Dec;3(14):2574-82. doi: 10.1096/fasebj.3.14.2556311.FASEB J. 1989.PMID: 2556311Review.