. 2019 Jan 13;2019:6568976. doi: 10.1155/2019/6568976
Copyright © 2019 Wen-Dien Chang 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 1.
Flow chart of the present study.