Fig. 3. Funnel plot analysis to detect publication bias.
Begg's funnel plot with pseudo 95% CI .A: CC vs TT; B: CT vs TT; C: CC vs CT+TT; D: CC+CT vs TT.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.