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Forest plot of Arg399Gln polymorphism of the XRCC1 gene and sensitivity to platinum-based drugs in non-small cell lung cancer, the horizontal lines correspond to the study-specific OR and 95% CI, respectively. The area of the squares reflects the study-specific weight. The diamond represents the pooled results of OR and 95% CI (AG vs. AA). A: Chinese population; B: Caucasus population.
