**Figure 6.** **Begg’s funnel plot and Egger’s linear regression test for publication bias in this meta-analysis.** (**A**) Begg’s funnel plot for OS (p=0.089); (**B**) Egger’s linear regression test for OS (p=0.057); (**C**) Begg’s funnel plot for RFS/PFS/DFS (p=0.260); (**D**) Egger’s linear regression test for RFS/PFS/DFS (p=0.160); (**E**) Begg’s funnel plot for CSS (p=1), and (**F**) Egger’s linear regression test for CSS (p=1).