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.
Olson LJ, Peterson FC, Castonguay A, Bohnsack RN, Kudo M, Gotschall RR, Canfield WM, Volkman BF, Dahms NM.Olson LJ, et al.Proc Natl Acad Sci U S A. 2010 Jul 13;107(28):12493-8. doi: 10.1073/pnas.1004232107. Epub 2010 Jun 30.Proc Natl Acad Sci U S A. 2010.PMID: 20615935Free PMC article.