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Programmed death‐ligand 2 (PD‐L2) expression in squamous cells isolated from oral squamous cell carcinoma (OSCC) patients and oral tissue microarray. A, Representative images of the exfoliative epithelium isolated from an OSCC patient and stained with papanicolaou and immunofluorescence. Scale bar = 50 μm. B, Immunohistochemical staining for PD‐L2 in various oral tissue samples by microarray. Scale bar = 50 μm
