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.
Visualization analysis of institutions and authors. (A) Radar map of the top 10 productive institutions. (B) The cluster network visualization of cooperation among institutions. (C) Density map of cooperation among institutions. (D) The cluster network visualization of authors.
