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.
Weigel LM, Radolf JD, Norgard MV.Weigel LM, et al. Among authors: radolf jd.Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11611-5. doi: 10.1073/pnas.91.24.11611.Proc Natl Acad Sci U S A. 1994.PMID: 7972112Free PMC article.