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.
Word co-occurrence network built using words present in titles, abstracts and keywords of articles published in 2021 (VOSviewer).
Notes: Bigger nodes represent more articles being published on the subject. Lines indicate the relations between pair of nodes (citations, co-occurrence of word, co-authorship). Colour of the clusters indicates a set of closely related publications.
