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.
Gheorghiu AI, Callan MJ, Skylark WJ.Gheorghiu AI, et al.Proc Natl Acad Sci U S A. 2017 Jun 6;114(23):5970-5975. doi: 10.1073/pnas.1620542114. Epub 2017 May 22.Proc Natl Acad Sci U S A. 2017.PMID: 28533389Free PMC article.