Figure 1.
Measures of extended abstinence. In this figure, “No smoking” may be defined by the product options outlined in Table 3.
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.