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Funnel plots of sPD-L1 in hepatocellular carcinoma. a Funnel plots of HR for OS of sPD-L1. b Funnel plots of HR for DFS/RFS/TTP/TFS of sPD-L1. 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
