Brief Article
Copyright ©2010 Baishideng.
World J Gastroenterol. Apr 21, 2010; 16(15): 1908-1915
Published online Apr 21, 2010. doi: 10.3748/wjg.v16.i15.1908
Figure 1
Figure 1 Study selection process. A flowchart was present in this figure and the flowchart summarizes the selection of studies including numbers and reasons of studies excluded.