Figure 4From: RETRACTED ARTICLE: Meta-analysis of the associations between TNF-α or IL-6 gene polymorphisms and susceptibility to lung cancer Funnel plots of the odds ratios of lung cancer for TNF-α and IL-6 polymorphisms by number of individual studies. (A) TNF-α gene polymorphism; (B) IL-6 gene polymorphism. IL-6: interleukin 6; OR, odds ratio; TNF-α: tumor necrosis factor-alpha.Back to article page