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Histology results in patient 6, lacking human papillomavirus-16 infection. (A and B) Hematoxylin and eosin staining; (C and D) in situ hybridization; and (E and F) immunohistochemical staining for p16INK4a. (A, C and E) Scale bar, 50 µm; and (B, D and F) scale bar, 10 µm.
