. 2019 Nov 20;7(4):150. doi: 10.3390/healthcare7040150
© 2019 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.
Experimental equipment and recording scene.