Figure 4.
Publication bias represented by Begg's funnel plot for the association between IL-18 polymorphisms and the risk of allergic disease under the dominant model. (a) IL-18 −607C/A polymorphism; (b) IL-18 −137G/C polymorphism.
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.