Fig. 7.
Immunochemical staining of collagen II of the control group (a, b, c), the blank group (d, e, f), and the experimental group (g, h, i) at 4 (a, d, g), 8 (b, e, h), and 12 (c, f, i) weeks
Scale bar=200 μm. Arrows show the chitosan scaffold
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