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A. HRs with corresponding 95% CIs of Interleukin-8 expression with OS. B. HRs with corresponding 95% CIs of Interleukin-8 expression in stage IV colorectal cancer patients with OS. C. Subgroup analysis of HRs with corresponding 95% CIs of serum source Interleukin-8 expression with OS. HR>1 implied worse survival for the group.
