Fig. 2
From: Meta-analysis of association between TCF7L2 polymorphism rs7903146 and type 2 diabetes mellitus
The funnel plots of publication bias in different models. The funnel plots showed the results of the publication bias analyses between rs7903146 and T2DM by using a Dominant Model, b Recessive Model, c Additive Model (CT vs CC), d Allele Model and e Additive Model (TT vs CC). The Y-axis indicated the standard error of each study, and the standard error was smaller, the effect of the meta-analysis would be better