FIGURE 1.
PRISMA-ScR flow chart. This flow chart depicts the flow stages of the screening process and articles retrieved, screened and included at various stages of the review process.
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.