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.
Forest plots of the association between CHRNA3 rs3743073 polymorphism and the risk of lung cancer in the Asian individuals (B vs A). Each square indicates a study, and the area of squares is proportional to the weight of the study. The diamond represents the summary odds ratio and 95% confidence interval. CI = confidence interval, OR = odds ratio.
