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(A) Western blot and (B) quantification for TGF‐β1 protein from the fibroblast lysates of tanshinones T17, T20 and T23‐treated, E64‐containing PIC‐treated and untreated cells for 48 h. Data represent mean ± SD (n = 4 independent experiments). *P < 0.05 significantly different from untreated samples; ns, not significant.
