©Johannes Knitza, David Simon, Antonia Lambrecht, Christina Raab, Koray Tascilar, Melanie Hagen, Arnd Kleyer, Sara Bayat, Adrian Derungs, Oliver Amft, Georg Schett, Axel J Hueber. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 12.08.2020.
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