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Effects of AA on chondrocyte fibrosis in rats. a, b Immunohistochemistry analysis of and COL-Ι and α-SMA in sections of tibial plateau of knee joints. c Quantitative data of percentage of COL-Ι- and α-SMA-positive cells in each group (n = 3 for each group). One-way ANOVA, *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001. Boxed regions in the bottom panels are shown in the top panels
