Figure 2.
Mean values of questionnaire of smoking urges factor 1 (a) and factor 2 (b) before and after smoking cigarettes and using ENDS.
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.