. 2021 Nov 5;9(11):1508. doi: 10.3390/healthcare9111508
© 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 8.
PRISMA scheme of publication selection.