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Expression of (A) LAG-3 on immune cells (magnification 200×). (B) TIM-3 (magnification 200×) (C) VISTA (magnification 200×) on immune cells. (D) Membrane-pattern of CD8 positive lymphocytes in oropharyngeal squamous cell carcinoma (OPSCC) (magnification 200×). Arrows pointing to positive staining.
