4.
Funnel plot of comparison 6: varenicline (1.0 mg 2/d) vs placebo, outcome: 6.1 abstinence at longest follow‐up
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.