. 2019 May 6;21(5):e13415. doi: 10.2196/13415
©Yinan Zhao, Hui Feng, Mingyue Hu, Hengyu Hu, Hui Li, Hongting Ning, Huijing Chen, Lulu Liao, Linlin Peng. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 06.05.2019.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.
Figure 1.
Flow diagram.