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Kaplan–Meier PFS curve of three treatment groups in KRAS-co-mutation classification (p < 0.05, statistical significance; p < 0.001, significant statistical significance, red indicates. p ≥ 0.05, no statistical significance, black indicates); (A) KRAS/TP53; (B) KRAS/STK11; (C) KRAS/ATM; (D) KRAS/SMAD4.
