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.
Network evidence and risk of bias of included studies. Network evidence plot for primary outcome of randomized trials (a–d), all-cause death of prospective observational studies (e and f), and risk of bias of included randomized trials (g).
