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Results of TUNEL assay in control (a), leptin-treated (b), leptin-melatonin-10 (LM10) treated (c), leptin-melatonin-20 (LM20) treated (d), melatonin-10 (M10) treated (e) rats, and apoptosis index (f). **P < 0.01; ***P < 0.001; leptin, LM10, LM20, and M20 versus control.
