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Kaplan-Meier curves for PFS of patients with colorectal cancer, according to their expression levels of adenosine triphosphate-binding cassette sub-family G (WHITE) member 2 (Junior blood group). The median PFS of the low-expression group was significantly longer than that of the high-expression group (242 vs. 104 days, P=0.047). PFS, progression-free survival; ABCG2, adenosine triphosphate-binding cassette sub-family G (WHITE) member 2 (Junior blood group).
