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. 2021 Aug 10;23(8):e25789. doi: 10.2196/25789

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©Quan Wang, Ke-Lu Yang, Zhen Zhang, Zhu Wang, Chen Li, Lun Li, Jin-Hui Tian, Ying-Jiang Ye, Shan Wang, Ke-Wei Jiang. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 10.08.2021.

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 https://www.jmir.org/, as well as this copyright and license information must be included.

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Distribution of 100 frequency keywords. (A) Network map of the frequency keywords(TOP100). (B) Dynamics and trends of the frequency keywords over times(TOP100).