Figure 1From: Radiofrequency ablation versus percutaneous ethanol injection for hepatocellular carcinoma: a meta-analysis of randomized controlled trials Study flow chart. ASCO, American Society of Clinical Oncology; CNKI, China National Knowledge Infrastructure; CBM, Chinese Biomedical Literature Database; CQVIP, Chongqing VIP database; EMBASE, Excerpta Medica dataBASE.Back to article page