A. Cryosections of PBS or AT-MSCs injected CD18-/- wounds at days 5 and 7 post-wounding were immunostained for α-SMA (red). Nuclei were stained with DAPI (blue). The dashed lines separate epidermis and wound bed. e, epidermis; wb, wound bed. Scale bars: 100 µm. B. Quantification of α-SMA immunofluorescence shown in (A) 