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.
Lee KJ, Freeman M, Steller H.Lee KJ, et al. Among authors: freeman m.EMBO J. 1991 Apr;10(4):817-26. doi: 10.1002/j.1460-2075.1991.tb08014.x.EMBO J. 1991.PMID: 1901263Free PMC article.
Urban S, Lee JR, Freeman M.Urban S, et al. Among authors: freeman m.EMBO J. 2002 Aug 15;21(16):4277-86. doi: 10.1093/emboj/cdf434.EMBO J. 2002.PMID: 12169630Free PMC article.