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Representative images of immunohistochemical staining with diaminobenzidine and hematoxylin in gastric cancer and gastric cancer with DM. (A and B) Sirt1 exhibited nuclear positivity. (C and D) Nampt exhibited positive staining in the cytoplasm. Sirt1, silent information regulator 1; Nampt, nicotinamide phosphoribosyltransferase; DM, diabetes mellitus.
