The content is available as a PDF (110.5 KB).
. 2000 Jan 15;20(2):RC55. doi: 10.1523/JNEUROSCI.20-02-j0003.2000
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.