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Semiquantitative analysis of IHC staining of TGF-β1. (a) Representative images of IHC staining of TGF-β1 in each group, confirming that Kangzhi syrup inhibited the expression of TGF-β1 in lung tissues by semiquantification under light microscope (10 × 40 magnification). The data are presented as the mean ± SEM. ∗p < 0.05; ∗∗∗∗p < 0.0001.
