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p16 protein expression was down-regulated in gastric cancer (GC) tissues. A. A representative positive, high expression of p16 protein in a PCHNT tissues; B. Absent of p16 expression in a poorly differentiated GC; original magnification ×200. C. Summary of the immunohistochemical staining results from 92 GCs and corresponding PCHNTs presented as ISS (immunohistochemical staining score) of the same samples.
