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HPV status by sample scores. For the cytologic preparations from head and neck squamous cell carcinomas, the reference scores of >3.0 and <0.85 (dashed lines) was found to have 100% sensitivity and 100% specificity in differentiating HPV positive (red diamonds) from HPV negative (black diamonds). The benign tonsils and lymph nodes (blue diamonds) were also scored as HPV negative. The y-values are shown on log scale.
