Figure 2.
(A) Analysis of the risk of Bias in non-randomized clinical trials; (B) Analysis of the risk of Bias in randomized clinical trials.
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.