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Chapter 262Figure S1. Flow diagram depicting the different phases of the systematic reviewFigure S1. Flow diagram depicting the different phases of the systematic reviewAdapted from the PRISMA 2020 flow diagram.1Records identified from databases (n = 5241) PubMed 1641; Embase 3600Records removed before screening: Duplicate records removed (n = 1171) Records screened (n =4070) Records excluded after title/abstract screening (n = 3738)Reports sought for retrieval (n = 332) Reports not retrieved (n = 2) Reports assessed for eligibility (n = 330) Reports excluded (n = 150) • genetic etiology undefined • condition not considered to be a neurodevelopmental disorder • unclear if criteria for parkinsonism were met • no original data • other Records identified from: Citation searching (n = 28)Reports assessed for eligibility (n = 28) Studies included in review (n = 208) Identification of studies via databases Identification of studies via cross-reference checkIdentification Screening IncludedReports sought for retrieval (n = 28) Adapted from the PRISMA 2020 flow diagram.1