Brief Article
Copyright ©2009 The WJG Press and Baishideng.
World J Gastroenterol. Oct 21, 2009; 15(39): 4962-4968
Published online Oct 21, 2009. doi: 10.3748/wjg.15.4962
Figure 4
Figure 4 A funnel plot about 2-year survival with regard to the publication bias of all analysis, shows the basic symmetrical and inverted funnel-shaped graphics.