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Validation of the risk model in the GEO cohort. A Distribution of patients in the GEO cohort based on the median risk score in the TCGA cohort. B PCA plot for HCCs. C The survival status for each patient (low-risk population: on the left side of the dotted line; high-risk population: on the right side of the dotted line). D Kaplan–Meier curves for comparison of the OS between low- and high-risk groups. E Time-dependent ROC curves for HCCs
