8.2. Analysis.
Comparison 8: Cognitive behavioural therapy + standard maintenance versus standard maintenance alone, Outcome 2: Substance misuse (drugs): numbers with cocaine‐negative specimens; at 17 weeks
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.