Figure 3From: The association of APE1 −656T > G and 1349 T > G polymorphisms and cancer risk: a meta-analysis based on 37 case-control studies Begg's funnel plot of publication bias test (−656 T > G; GG vs . TT/TG). Each point represents a separate study for the indicated association. Log (OR), natural logarithm of OR; Horizontal line, mean effect size.Back to article page