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The association between the expression of HPV16 E7 and COX-2 in invasive breast ductal carcinoma. (A) The expression of COX-2 in HPV16 E7-positive and negative samples. **P<0.01. (B) Representative images of the expression of HPV16 E7 and COX-2 in invasive ductal breast carcinoma tissues by immunohistochemistry (magnification, ×400; scale bar, 50 µm). HPV, human papilloma virus; COX-2, cyclooxygenase-2.
