. 2020 Jan 6;22(1):e15337. doi: 10.2196/15337
©Yavuz Inal, Jo Dugstad Wake, Frode Guribye, Tine Nordgreen. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 06.01.2020.
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Figure 1.
Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) flow diagram of article inclusion.