Figure 1
The flowchart is titled “Identification of studies via databases and registers”. The flowchart is organized vertically into three main phases: “Identification”, “Screening”, and “Included”. In the “Identification” phase, the first box indicates “Records identified from asterisk: Databases (n equals 162), Registers (n equals 0)”. An arrow points to the right to a box labeled “Records removed before screening: Duplicate records removed (n equals 23)”. The flow moves downward into the “Screening” phase. The first box in this section is “Records screened (n equals 139)”, with an arrow pointing right to “Records excluded double asterisk (n equals 25)”. An arrow leads down to a box, “Reports sought for retrieval (n equals 114)”. From this box, an arrow leads to the right to a box “Reports not retrieved (n equals 4)”. The flow moves down to a box labeled “Reports assessed for eligibility (n equals 110)”. An arrow from this box points right to a box labeled “Reports excluded: Reason 1: abstract content (n equals 88)”. Finally, the flow concludes in the “Included” phase at the bottom. A single box indicates the end result: “Studies included in review (n equals 22)”.PRISMA 2020 flow diagram of study selection. Source: Authors’ own work, Page et al. (2021)