Abundance of immune checkpoint molecules and their ligands in Oropharyngeal Squamous cell carcinoma (OPSCC) depends on HPV status and can be modulated by demethylation. - Fehn, A; Ezic, J; Brunner, C; Theodoraki, Marie-Nicole; Döscher, J; Schuler, P; Greve, J; Marienfeld, R; Koretz, K; Hoffmann, T; Laban, S (Laryngo-Rhino-Otologie, 2020)