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(A) Forest plot of colitis in patients treated with immune checkpoint inhibitor plus chemotherapy vs. chemotherapy. (B) Funnel plot of colitis in patients treated with immune checkpoint inhibitor plus chemotherapy vs. chemotherapy. ICI, immune checkpoint inhibitor; CTLA-4, cytotoxic T lymphocyte antigen-4; PD-1, programmed death 1; SE, standard error; RR, risk ratio.
