Figure 3.
Flow of systematic reviews through the phase of screening and eligibility evaluation. * For some reviews, more than one exclusion criteria was noted, therefore numbers do not add up to 73.
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.