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.
Gibofsky A, Winchester RJ, Patarroyo M, Fotino M, Kunkel HG.Gibofsky A, et al. Among authors: kunkel hg.J Exp Med. 1978 Dec 1;148(6):1728-32. doi: 10.1084/jem.148.6.1728.J Exp Med. 1978.PMID: 309927Free PMC article.