. 2021 Jan 5;9(1):47. doi: 10.3390/healthcare9010047
© 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 (http://creativecommons.org/licenses/by/4.0/).
Figure 1.
Flow chart of literature search and selection.