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(A) Kaplan-Meier curve for overall survival of 32 patients in the validation cohort. The median survival time was 37.4 months and the overall 2- and 5-year survival was 74.6% and 26.9%, respectively; (B) Kaplan-Meier curves for overall survival of 32 patients in the training cohort stratified by risk groups. The median overall survival time according to the risk group was not reached, 45.9 and 14.5 months for risk 0 (n=4), 1 (n=18) and 2 (n=10), respectively (P=0.0002).
