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Comparison of serum amylase levels at 3, 12, and 24 h in four groups. A P < 0.01 versus SO group at the same time point; B P < 0.01 versus SAP group at the same time point; 12 h versus 3 h in the same group, C P < 0.01; 24 h versus 12 h in the same group, D P < 0.01; 24 h versus 3 h in the same group, E P < 0.01.
