. 2019 Mar 18;2019:9864841. doi: 10.1155/2019/9864841
Copyright © 2019 Yun-fei Xie et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 7.
The PLS-DA S-plot in ESI+ and ESI−.