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Kaplan–Meier estimates of recurrence-free interval according to ctDNA in colon cancer patients after adjuvant chemotherapy. ctDNA status after adjuvant chemotherapy in patients with colon cancer. (A) Stage II; ctDNA positivity immediately after completion of chemotherapy was associated with poorer RFS. From Tie et al., 2016 [21]. (B) In Stage III. From Tie et al. [123].
