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Forest plots for the TNF-a-238G/A polymorphism and breast cancer risk. (A) Additive model (A vs G) Asian, Caucasian; (B) homozygous model (AA vs GG) Asian, Caucasian; (C) dominant model (AA + GA vs GG) Asian, Caucasian; (D) recessive model (AA vs GG + GA) Asian, Caucasian. CI = confidence interval, TNF-a = tumor necrosis factor-alpha.
