Rapid Communication
Copyright ©2008 The WJG Press and Baishideng.
World J Gastroenterol. Jan 14, 2008; 14(2): 307-312
Published online Jan 14, 2008. doi: 10.3748/wjg.14.307
Figure 1
Figure 1 Funnel plot to explore publication bias. The graphical funnel plot of the 10 published studies appears to be asymmetrical.