Fig. 4From: The efficacy and safety of combination of PD-1 and CTLA-4 inhibitors: a meta-analysisForest plot of risk ratio (RR). Relative total treatment-related adverse event rate (a) and grade 3–4 treatment-related adverse event rate (b) of α-CTLA-4 plus α-PD-1 combination treatment compared with other treatments. CI: confidence intervalBack to article page