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Malondialdehyde (MDA) levels and glutathione peroxidase (GPX) activity in the heart and liver of gerbils treated for 14, 16, or 18 weeks with saline or iron. Malondialdehyde levels (A, B) and glutathione peroxidase activity (C, D) were measured in the (A, C) heart and (B, D) liver. Data are presented as mean ± SD (n = 6 for all subgroups). a, P < 0.05 vs saline; b, P < 0.05 vs 14-week iron; c, P < 0.05 vs 14-week iron; d, P < 0.05 vs 16-week iron.
