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Effect of melatonin on serum biochemical indices in weaned piglet (n = 6 per treatment group). Glu, glucose; TG, triglyceride; CHO, cholesterol; HDL-C, high density lipoprotein cholesterol; LDL-C, low density lipoprotein cholesterol; IgM, immunoglobulins M; IgG, immunoglobulins G. Data are presented as means ± SEM.
