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Sensitivity analysis of this meta-analysis. a Sensitivity analysis of OS. b Sensitivity analysis of DFS/RFS/TTP/TFS. CI, Confidence interval; HR, Hazard ratio; OS, Overall survival; sPD-L1, Soluble programmed cell death ligand-1; DFS, Disease-free survival; RFS, Recurrence-free survival; TTP, Time to progression; TFS, Tumor-free survival
