. 2020 May 29;8(2):148. doi: 10.3390/healthcare8020148
© 2020 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 4.
Distribution of all three cases for China.