fig1

Figure 1. Histological staining of healed skin in each experimental group. Masson trichome staining shows the distribution and density of collagen protein in healed skin in various groups. Collagen protein was stained blue, nuclei are stained black and the background (muscle, cytoplasm and keratin) are stained red. Immunohistochemistry staining shows the expression of collagen Type I and Type III of healed skin in normal skin, silver treated, and untreated groups, respectively (scale bar: 20 μm)^[9] (used with permission)