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. 2021 Jun 4;23(6):e24712. doi: 10.2196/24712

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©Syed Ghulam Sarwar Shah, David Nogueras, Hugo Cornelis van Woerden, Vasiliki Kiparoglou. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 04.06.2021.

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 https://www.jmir.org/, as well as this copyright and license information must be included.

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Risk of bias graph. Review authors’ judgments about each risk of bias item are presented as percentages across all included studies.