Figure 3. Construction and validation of three-gene risk score model. (A) The heatmap and distribution of the three gene expression profiles in the high-risk and low-risk subgroups for the discovery cohort; (B) Kaplan-Meier analysis of patients’ OS in the high-risk and low-risk subgroups of the discovery cohort; (C) The heatmap and distribution of the three gene expression profiles for the validation-1 cohort; (D) Kaplan-Meier analysis of the validation-1 cohort; (E) The heatmap and distribution of the three gene expression profiles for the validation-2 cohort; (F) Kaplan-Meier analysis of the validation-2 cohort.