Brief Article
Copyright ©2012 Baishideng Publishing Group Co.
World J Gastroenterol. Apr 14, 2012; 18(14): 1672-1679
Published online Apr 14, 2012. doi: 10.3748/wjg.v18.i14.1672
Figure 1
Figure 1 A funnel plot was used to estimate the publication bias of the studies included in the meta-analysis performed.