Figure 1
The process begins with 2800 studies identified from databases. Before screening, 719 duplicate references are removed, leaving 2081 records for screening. Screening excludes 823 records, then 1258 studies proceed to retrieval. Of these, 10 studies are not retrieved, and 1243 studies undergo eligibility assessment. Eligibility assessment excludes 1029 studies, resulting in 214 studies included in the review.PRISMA flow diagram