Figure 2.
Mean(±SE) change in values of the natural log (ln) of HF-HRV following imagery and ad-lib smoking. *Guanfacine significantly different versus placebo.
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.