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(RADA)4-SDKP hydrogel increased angiogenesis and reduced inflammation. (A) More vessels (α-SMA⁺ cells) were detected in the Gel and Gel + Cell groups compared with the Vehicle group. (B) A lower number of CD68⁺ macrophages were observed in the Gel and Gel + Cell groups compared with the Cell and Vehicle groups. All data are presented as mean ± standard deviation (n ≥ 3). * p < 0.05; ** p < 0.01.
