Figure 2From: Radiofrequency ablation versus percutaneous ethanol injection for hepatocellular carcinoma: a meta-analysis of randomized controlled trials Comparison of overall survival between radiofrequency ablation and percutaneous ethanol injection for hepatocellular carcinoma (fixed effects model). CI, confidence interval; HR, hazard ratio; PEI, percutaneous ethanol injection; RFA, radiofrequency ablation; SE, standard error.Back to article page