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.
Mower GD, Christen WG.Mower GD, et al. Among authors: christen wg.Brain Res Dev Brain Res. 1989 Feb 1;45(2):211-8. doi: 10.1016/0165-3806(89)90040-0.Brain Res Dev Brain Res. 1989.PMID: 2713980