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(a) Wound healing conditions of mice in the control group, the hydrogel group, the BMSCs group and the hydrogel–BMSCs combination group, 3, 5, 7, and 14 days after the operation with comparison of the wound healing rates of mice (** p < 0.01). (b) The comparison of wound area in two different groups (G1: without treatment and G2: treated with BMSCs plus the biomaterial, * p < 0.05) and the graph of residual wound site [136,137].
