H. Four full-thickness excisional wounds were produced on each of CD18-/- mouse by 6 mm biopsy punches. Each wound received intradermal injection of 2.5x105 AT-MSCs or human dermal fibroblasts (HDF) or TGF-β1 siRNA transfected AT-MSCs or control siRNA transfected AT-MSCs or PBS. Each wound region was digitally photographed at days 0, 3, 5, 7 and 10 post-wounding, and wound areas were analyzed using Adobe Photoshop. The depicted result is the quantitative analysis of all wound areas per group, expressed as percentage of the initial wound size at day 0. 