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Comparison of serum DAO levels in groups A and B. Note: The X-axis represents before and after treatment, and the Y-axis represents the serum DAO level (IU/ml). The serum DAO levels of patients in group A before treatment were (7.62±0.92) IU/ml while (5.63±0.22) IU/ml after treatment. The serum DAO levels of patients in group B before treatment were (7.58±0.88) IU/ml while (4.03±0.44) IU/ml after treatment. ***means that a significant difference with P<0.001.
