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Plasma products of lipid peroxidation (LPO) (A) and NOx (B) before (0) and after 3 and 6 months of treatment with melatonin, compared with healthy controls. * p < 0.05, ** p < 0.01, and *** p < 0.001 vs. control; ‡ p < 0.05, ‡‡ p < 0.01, and ‡‡‡ p < 0.001 vs. 0; † p < 0.05 vs. 3.
