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. 2019 Dec 5;12:989–1005. doi: 10.2147/JMDH.S228951

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© 2019 Feyissa et al.

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Study selection process (Adapted from Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group (2009). Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement. PLoS Med 6(6): e1000097. doi:10.1371/journal.pmed1000097).