. 2021 Jul 30;9(8):969. doi: 10.3390/healthcare9080969
© 2021 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Figure 6.
DDA cluster map of the top 20 author keywords.