Figure 8. The Deek's funnel plot for the assessment of potential publication bias.
There was no significant publication bias (P = 0.06).
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.