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.
Ozias-Akins P, Roche D, Hanna WW.Ozias-Akins P, et al.Proc Natl Acad Sci U S A. 1998 Apr 28;95(9):5127-32. doi: 10.1073/pnas.95.9.5127.Proc Natl Acad Sci U S A. 1998.PMID: 9560240Free PMC article.