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. 2020 Oct 9;8(10):e21364. doi: 10.2196/21364

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©Alicia Mehl, Francois Bergey, Caoimhe Cawley, Andreas Gilsdorf. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 09.10.2020.

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 JMIR mHealth and uHealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Relative difference (log2 fold change values) in the proportions of Ada users' reported symptoms with statistically significant differences between the baseline and COVID-19 measures periods in Germany and the United Kingdom.