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A. Paraffin-embedded renal sections (3 μm) were subjected to Periodic Acid-Schiff staining (PAS), Masson trichrome staining and Sirius red staining. B. Tubular damage score was determined based on PAS staining; renal interstitial fibrosis was evaluated by Masson staining; and the areas positive for Sirius red staining were also analyzed. (***p<0.001, **p<0.005, scale = 100μm, magnification×400)
