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Survival difference between high- and low-risk patients in different subgroup. (A) Age <50. (B) Age >50. (C) Female. (D) Male. (E) Primary tumor. (F) Recurrent tumor. (G) KPS ≤70. (H) KPS >70. (I) Radiotherapy: No. (J) Radiotherapy: Yes. (K) Chemotherapy: No. (L) Chemotherapy: Yes. (M) Mesenchymal. (N) Non-mesenchymal. KPS, Karnofsky.
