FIGURE 1.
PRISMA 2009 flow diagram (24). Adapted with permission from the PRISMA team as stated on https://www.prisma-statement.org//PRISMA Statement/CitingAndUsingPRISMA.aspx.
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.