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Immunohistochemical staining with MMP-9 in control and treated groups. The pattern of distribution of the MMP-9 staining is similar as with the VEGF study, but anti–MMP-9 antibody immunoreactivity was more intense in TC on day 8 (arrows); on the day 15, the immunoreactions were reduced and no differences were observed among the treated groups (arrowheads)
