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Immunohistochemical analysis for iNOS protein in ACF. (A) weak staining was observed in the cytoplasm of nonhyperplastic ACF. (SP method, × 200). (B) weak staining was observed in the cytoplasm of hyperplastic ACF. (SP method, × 200). (C) strong staining was observed in the cytoplasm of dysplastic ACF. (SP method, × 200).
