. 2019 Feb 12;24(3):640. doi: 10.3390/molecules24030640
© 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 4.
CRN macro-areas contribution (2008–2018).