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Kaplan-Meier estimates of disease-free survival among patients with HNSCC according to PLAU, THBS1, IGFBP7 and MMP14 expression. The patients were divided into high versus low expression based on the median IHC staining intensity scores for each marker. The comparison of the KM curves between the high (above-median) and low (below-median) protein expression groups was based on the log-rank test (p values shown).
