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.
A: Begg's funnel plot with pseudo 95% confidence limits. B: Filled funnel plot with pseudo 95% confidence limits. WMD, weighted mean difference; S.E., standard error.
