Fig. 1From: Successful healing of non-healing surgical wound based on the release of platelet-derived growth factors from single donor allogeneic platelet-RICH plasma with one freeze-thaw cycle: a case report after a 1-year follow-upA persistent approximately 35 × 18-mm ulcer on the front of the right knee (A, B). The ulcer before the treatment: Appearance when removing dressing (C). Wound cleaning and dressing changes (D). After debridement, the al-PRP was administrated immediatelyBack to article page