Figure 1. Quality check for Han et al. using the AMSTAR tool.
AMSTAR: Assessment of Multiple Systematic Reviews; PICO: patient/population, intervention, comparison, outcome; RoB: risk of bias
Figure credit: Javaria Ayyub
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.