Fig. 4From: RETRACTED ARTICLE: Bone Marrow Mesenchymal Stem Cell-Derived Exosomal MicroRNA-133a Restrains Myocardial Fibrosis and Epithelial–Mesenchymal Transition in Viral Myocarditis Rats Through Suppressing MAML1Up-regulated exosomal miR-133a decreases CVF in myocardial tissues of rats with VMC. A Masson staining of myocardial tissues in rats; B Collagen volume fraction of rats in each group. **P < 0.001Back to article page