Figure 4.

Funnel plot for the detection of the publication bias in this meta-analysis. a Funnel plot for contrast AA + AG vs. GG of TNF-α-308G/A polymorphism in overall analysis; b Funnel plot for contrast AA + AG vs. GG of TNF-α-238G/A polymorphism in overall analysis.

Ma et al. Diagnostic Pathology 2014 9:74   doi:10.1186/1746-1596-9-74
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