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Confirmation of the ERG signature via stratification of patients from the training set based on specific demographic and clinical features. (A) Age < 65 years; (B) age ≥ 65 years; (C) male; (D) female; (E) stage I; (F) stage II; (G) stage III; (H) T2; (I) T3; (J) M0; and (K) N0.
