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QL improved myocardium ultrastructure and reduced fibrosis. (A) TEM images of left ventricles of rats. (B, C) IHC disclosed that QL markedly downregulated collagens I and III. (D) Collagens I and III positive integral optical density. *p < 0.05, **p < 0.01 vs. control group. #p < 0.05, ##p < 0.01 vs. CHF group.
