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Outcomes and outcome measurement instruments1355Supplementary figuresRecords identified from:Databases (n = 3971)Registers (n = 856)Records removed before screening:Duplicate records removed (n = 320)Records screened(n = 4507)Records excluded(n = 4026)Reports assessed for eligibility(n = 481) Databases (n = 378) Registers (n = 103)Reports excluded (n = 169):Not a clinical trial (n = 33)Wrong population (n = 41)Wrong outcome measure (n = 52)Other (e.g. feasibility study, duplicate; n= 43)Studies included in review (n=312) Databases (n = 251) Registers (n = 61)Identification of studies via databases and registersIdentification Screening IncludedFigure 1. PRISMA Flowchart.PRISMA = Preferred Reporting Items for Systematic Reviews and Meta-Analysis.Figure 2. Results of VOSviewer to visually identify potentially irrelevant terms eligible for exclusion in order to enhance precision of search results. Annelieke Muller sHL.indd 135 14-11-2023 09:07