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. 2020 Nov 16;22(11):e20709. doi: 10.2196/20709

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©Juraj Matis, Miroslav Svetlak, Alena Slezackova, Marek Svoboda, Rastislav Šumec. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 16.11.2020.

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 the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Search and selection process and reasons for exclusion according to the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) guidelines. mHealth: mobile health; ICTRP: International Clinical Trials Registry Platform.