Brief Article
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Sep 14, 2011; 17(34): 3941-3947
Published online Sep 14, 2011. doi: 10.3748/wjg.v17.i34.3941
Figure 1
Figure 1 Flow chart of selection of studies and specific reasons for exclusion from the meta-analysis.