Figure 2
The flowchart is organized into four vertically stacked sections on the left labeled “Identification”, “Screening”, “Eligibility”, and “Included”. In the “Identification” section at the top, two horizontally aligned rectangular boxes are shown, labeled “Database: Scopus Total Number Of articles found 674” and “Database: Web of Science Total Number Of articles found 399”. Downward arrows from both boxes merge into a single arrow that leads to a box labeled “Total Number Of Articles: 1.073. A vertical arrow from this box points down to the “Screening” section, with a box labeled “Total Number Of Articles screened: 299”. From this screening box, a horizontal arrow extends to the right toward a rectangular box labeled “Exclusion beforied:”, which contains the bullet points “Duplicates: 123”, “Publication period (from 2015): 30”, “Languages (English Only): 28”, and “Non-recognized databases: 593”. Returning to the central flow, a downward arrow from “Total Number Of Articles screened: 299” leads into the “Eligibility” section, to a box labeled “Total Number Of articles evaluated for inclusion (complete Reading): 42”. On the right of this box, a box Is labeled “Total number Of articles excluded: 18”. Continuing downward within the main flow, a vertical arrow from “Total Number Of articles evaluated for inclusion (complete Reading): 42” leads into the “Included” section, ending at the final box labeled “Total Number Of articles included: 24”.Study selection flowchart (PRISMA). Source: The authors based on Moher et al. (2009)