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Kaplan-Meier estimates of progression-free survival and overall survival, according to treatment groups. A: Shows progression-free survival; median was 2.0 mo in the group received capecitabine, 2.7 mo in the group received S-1; B: Shows overall survival; the median was 4.3 mo in the capecitabine group and 5.0 mo in the S-1 group.
