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. 2019 May 23;21(5):e13868. doi: 10.2196/13868

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©Ushashree Divakar, Nuraini Nazeha, Pawel Posadzki, Krister Jarbrink, Ram Bajpai, Andy Hau Yan Ho, James Campbell, Gene Feder, Josip Car. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 23.05.2019.

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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Preferred Reported Items for Systematic Reviews and Meta-analyses chart summarizing the selection process. RCT: randomized controlled trial.