Fig. 5:
Funnel plot for evaluation of Publication bias in investigating the effect of influenza vaccine on the risk of all-cause mortality according to the results of clinical trial studies
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.