Meta-Analysis
Copyright ©2014 Baishideng Publishing Group Inc.
World J Gastrointest Endosc. Nov 16, 2014; 6(11): 555-563
Published online Nov 16, 2014. doi: 10.4253/wjge.v6.i11.555
Figure 4
Figure 4 Funnel plot of publication bias for mean operation time.