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Granulation tissue, collagen, and expression of CD31 for different groups on the wound healing on the 8th day. (A) Images of HE, Masson and CD31 after covering with PBS, CLD hydrogel, CLD-hFGF2 and CLD-hFGF2 hydrogel. (B) Visualization of data on CD31 signals. (n = 4, ** p < 0.01) (HE and Masson staining are shown at 4 × 10 magnification, scale bar = 50 μm; CD31 staining is shown at 40 × 10 magnification, scale bar = 50 μm).
