. 2020 Sep 15;22(9):e18290. doi: 10.2196/18290
©Feng-Qin Chen, Yu-Fei Leng, Jian-Feng Ge, Dan-Wen Wang, Cheng Li, Bin Chen, Zhi-Ling Sun. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 15.09.2020.
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.
Flowchart of the study selection process. RCT: randomized controlled trial.