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The subgroup survival analysis between high and low risk group in patients of age ≤65 (A), age >65 (B), T stage I-II (C), T stage III-IV (D), N0 stage (E), N1 stage (F). The survival analysis between high and low risk group, and corresponding area under ROC curve in cluster 1 cohort (G,H), cluster 2 cohort (I,J), cluster 3 cohort (K,L).
