Figure 2.
Risk of bias graph and summary of the included studies: Reviewers’ judgments regarding each risk of bias item for the included studies. The figure was generated using RoB 2 tool (the 22 August 2019 version)
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.