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Survival curve of 2-year disease-free survival (DFS) in patients with colon cancer treated with oxaliplatin-containing adjuvant chemotherapy based on histological grade. Patients with well differentiated and moderately-poorly differentiated tumors had 2-year DFS of 85.1% and 66.9% (HR =3.503; 95% CI, 1.403–8.744; P=0.007).
