FIGURE 1.
Flowchart of the study. The diagram reports the process of screening and choice applied to the results from all databases; starting by 2056 articles, only 11 were admitted at the last phase of the 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.