. 2020 Jul 31;22(7):e16981. doi: 10.2196/16981
©Yang Xiang, Hangyu Ji, Yujia Zhou, Fang Li, Jingcheng Du, Laila Rasmy, Stephen Wu, W Jim Zheng, Hua Xu, Degui Zhi, Yaoyun Zhang, Cui Tao. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 31.07.2020.
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