. 2019 Feb 21;21(2):e12997. doi: 10.2196/12997
©Zhilian Huang, Monika Semwal, Shuen Yee Lee, Mervin Tee, William Ong, Woan Shin Tan, Ram Bajpai, Lorainne Tudor Car. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 21.02.2019.
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Figure 1.
Preferred Reporting Items for Systematic Reviews and Meta-Analyses flowchart of included studies.