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Celecoxib administration activates antitumor immunity in Novikoff HCC during epirubicin therapy. Immunohistochemistry analysis. (A) FOXP3, (B) CD68, (C) CD8, and (D) PD‐L1 from tumor tissues after therapy for 7 days. Data were mean ± SD (n.s. = no significance, *P < 0.05, **P < 0.01). Scale bar = 50 μm.
