Histology of control wounds in the punch biopsy model (×20). (Scale bar=1000 µm) (a and b) Day 8 of healing (c and d) and day 15 of healing. Hematoxylin and eosin staining (a and c) and Picrosirius staining (b and d). (a and c) Inserts in (a) and (c) highlight high magnification (×200) images of area of inflammatory cell infiltration. (d) Insert highlights birefringence image showing newly deposited collagen fluorescing green at the interface with the graft.