Figure 3.
Graphical representation of the used software, number of mentions across the reviewed articles, and percentual usage distribution of free versus paid software.
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.