. 2020 May 29;8(5):e17813. doi: 10.2196/17813
©Qiqing Bi, Lining Shen, Richard Evans, Zhiguo Zhang, Shimin Wang, Wei Dai, Cui Liu. Originally published in JMIR Medical Informatics (http://medinform.jmir.org), 29.05.2020.
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Figure 7.
Topic evolution by year, with each category reported as a proportion of the total comments per year.