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Changes of serum MMP-7 before and after treatment in the two groups. The results of ELISA showed that there was no significant difference in serum MMP-7 expression level between the two groups before treatment (P>0.05). However, after treatment, the level in the two groups was significantly decreased, and the study group was statistically significantly lower than the control group (P<0.05). *P<0.05, compared with before treatment. #P<0.05, compared with the study group.
