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The gross appearance of the wound at 37 days (a) and 9 months (b) after the first PRP application. (a) Fourteen days after freeze-dried PRP application (37 days after the first application), more than half of the wound was epithelialized, and the rest of the wound was covered with granulation tissue. (b) The wound has no recurrent ulceration after 9 months. PRP indicates platelet-rich plasma.
