case_images: PMC7327402_01
case_images: PRISMA flow diagram demonstrating identification and selection of eligible studies for this review.
case_images: publichealth-07-02-022-g001.jpg
case_images: PMC7327402_01_publichealth-07-02-022-g001.jpg
case_images: publichealth-07-02-022-g001
case_images: The study quality assessment for reporting systematic reviews was done according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement (Figure 1).