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Copyright ©2008 The WJG Press and Baishideng.
World J Gastroenterol. Feb 7, 2008; 14(5): 685-692
Published online Feb 7, 2008. doi: 10.3748/wjg.14.685
Figure 1
Figure 1 Selection criteria and proportion of evidence level in surgical treatment of hepatocellular carcinoma. We searched the literature using the Medline Dialog System with four keywords: HCC, surgery, English papers, in the last 20 years. The 915 publications were systematically reviewed by 3 steps. Almost all publications were retrospective (76%), there were only 24 (24%) with a high level evidence.