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Silymarin attenuates I/R-induced iNOS expression in the lungs, as evaluated using (A) western blotting assays and (B) statistical analysis of iNOS expression levels. **P<0.01 compared with the control group; ##P<0.01 compared with the I/R group. iNOS, inducible nitric oxide synthase; I/R, ischemia/reperfusion.
