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Metformin reduces plasma levels of TGF‐β1 in type 2 diabetic patients. A, Plasma levels of TGF‐β1 were measured in the type 2 diabetic patients treated with metformin or other glucose‐lowering drugs, as compared to normal subjects. Data including sample number and values are presented in Table. B, Bar graph represents the levels of plasma TGF‐β1 (Mean ± SD). One‐way ANOVA was used to assess significance of difference, *P < .05, ***P < .001
