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.
Pearlman E, Lass JH, Bardenstein DS, Kopf M, Hazlett FE Jr, Diaconu E, Kazura JW.Pearlman E, et al.J Exp Med. 1995 Oct 1;182(4):931-40. doi: 10.1084/jem.182.4.931.J Exp Med. 1995.PMID: 7561696Free PMC article.