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The ulcer healing process of patient 18. (A): Ulcer and cyanosis could be seen on the tip of the first toe 5 days before transplantation. (B): The ulcer was enlarged 3 months after the transplantation, but the cyanosis was improved, and scaling was observed on the bottom of the foot and toes. (C): The ulcer was completely healed 6 months after the transplantation.
