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Overall survival according to PD-L1 expression on TC and CD8+ infiltrating lymphocytes in OPSCC in the whole cohort (A) in human papillomavirus (HPV)-negative OPSCC (B) and in HPV-related OPSCC (C). Survival according to PD-L1 expression on macrophages in the whole cohort (D), HPV-negative (E), and HPV-related (F) OPSCC (p-values calculated by log-rank test).
