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Kaplan-Meier curves of disease specific and OS in four cohorts: Kaplan-Meier curves for (A) disease specific survival and (B-D) OS of patients with low and high miR-21 expression assessed by chromogenic in-situ hybridization in tissue microarrays including (A) Glasgow training cohort (n = 189), (B) Pisa validation cohort (n = 69), (C) Sydney validation cohort (n = 249) and (D) ICGC validation cohort (n = 179).
