Brief Article
Copyright ©2012 Baishideng Publishing Group Co.
World J Gastroenterol. Oct 21, 2012; 18(39): 5608-5615
Published online Oct 21, 2012. doi: 10.3748/wjg.v18.i39.5608
Figure 1
Figure 1 Flow chart of selection of studies and reasons for exclusion from the meta-analysis.