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Photographs of the wound healing status after the injection of normal saline (control), sulfadiazine silver cream and Ag–AV–SF hydrogel: (a) extent of the wound regenerating area on Days 0, 7, 14 and 21 after surgery, (b) the statistical analysis of the wound area (NS: non-significant, *P < 0.05, **P < 0.01)
