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.
a) Mean total responses (±SEM) recorded on the food and cocaine levers during the last day of extinction (Last Ext.) and the two hour test for cocaine-primed reinstatement. b) Mean percentage (±SEM) of responses made on each lever during baseline preference and during the test for cocaine-primed reinstatement.
