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. 2019 Jan 3;7(1):e10371. doi: 10.2196/10371

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©Ralph Maddison, Susie Cartledge, Michelle Rogerson, Nicole Sylvia Goedhart, Tarveen Ragbir Singh, Christopher Neil, Dinh Phung, Kylie Ball. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 03.01.2019.

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 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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Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) flowchart depicting the article selection process.