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. Author manuscript; available in PMC: 2022 Mar 1.
Published in final edited form as: Addiction. 2020 Sep 15;116(3):457–473. doi: 10.1111/add.15227

Figure 1. Studies included in systematic review and meta-analysis.

Figure 1.

Adapted from the 2009 PRISMA Flow Diagram. Moher D, Liberati A, Tetzlaff J, Altman DG, The PRISMA Group. Preferred Reporting Items for Systematic Reviews and MetaAnalyses: The PRISMA Statement. PLoS Med 2009;6(7): e1000097. doi:10.1371/journal.pmed1000097