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Kaplan–Meier estimates of relapse‐free survival (RFS) and overall survival (OS) in colorectal cancer patients, according to treatment group. (a,b) RFS in patients with extended RAS mutation (a) and with no RAS mutation (b). (c,d) OS in patients with extended RAS mutation (c), and with no RAS mutation (d). Adj, adjuvant; CI, confidence interval; HR, hazard ratio; UFT, tegafur–uracil.
