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.
Lidow MS, Goldman-Rakic PS, Rakic P.Lidow MS, et al.Proc Natl Acad Sci U S A. 1991 Nov 15;88(22):10218-21. doi: 10.1073/pnas.88.22.10218.Proc Natl Acad Sci U S A. 1991.PMID: 1658799Free PMC article.