Figure 1.
PRISMA study flow diagram of the systematic review from the initial search and screening to the final selection of publications to be included in the systematic review.
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.