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. 2021 Oct 22;18(16):3808–3820. doi: 10.7150/ijms.63401

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General appearance and Safranin-O & fast green staining showing the effect of HAg-CS implantation and/or moderate-intensity exercise on cartilage repair. The macroscopic appearance showed the repaired cartilage tissue in the healing wound in BC group (A), HC group (B), ME group (C) and HC+ME group (D). Safranin-O & fast green staining of cartilage repair in the four groups was shown (E). The general appearance of articular surface was graded by Wayne's grading scale (F). The articular cartilage thickness (G) and bone area (H) were calculated from the pictures. Data are represented as mean ± s.e.m. (* p<0.05)