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.
Experimental timeline. Protocols included repeated acquisition (RA) and discrimination reversal (DR) training, determinations of cocaine dose-response functions, extended cocaine self-administration conditions, intermittent touchscreen-based probes, reinstatement, and cocaine discontinuation (washout). See Procedures for additional information.
