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The hepatic Cu/Zn SOD activity (A) and TBARS level (B) in experimental groups. Results are shown as the mean±SD; n=5 mice per group. abcdeMeans sharing the same letter are not significantly different from each other (P>.05). SOD, superoxide dismutase; TBARS, thiobarbituric acid-reactive substances; B, berberine; S, silymarin.
