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Expressions of CD147 and MMP-9 in para-AEG tissue. Immunohistochemical staining showed that CD147 (A) and MMP-9 (B) were very weakly or negatively expressed in para-AEG tissues (high power field, ×400). MMP-9, matrix metalloproteinase 9; AEG, adenocarcinoma of esophagogastric junction.
