Meta-Analysis
Copyright ©2013 Baishideng Publishing Group Co.
World J Gastroenterol. Nov 28, 2013; 19(44): 8114-8132
Published online Nov 28, 2013. doi: 10.3748/wjg.v19.i44.8114
Figure 7
Figure 7 Funnel plot of operation time of all included studies.