Figure 5.
Deek's funnel plot for publication bias. No significant publication bias was observed in the present meta-analysis (P = 0.195).
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.