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(a) Forest plot summarizes a pooled analysis of acute erythema distinguishing patients with/without (A) wt XRCC1 Arg194Trp; (B) wt XRCC3 Thr241Met; (C) wt XRCC1 Arg399Gln; (D) GSTA1; (E) GSTP1. The mutation is toxic or protective when OR is higher or lower than 1, respectively.
