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. 2020 Jul 9;15(7):e0234827. doi: 10.1371/journal.pone.0234827

Fig 1. PRISMA diagram of included and excluded studies.

Fig 1

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(7): e1000097. doi:10.1371/journal.pmed1000097.