“…Of the remaining 42 full-text studies retrieved, 21 were excluded because they did not present data of interest or were repeated articles. Ultimately, 21 articles [ 2 , 3 , 6 , 7 , 8 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ] were included for systematic review. Because the data homogeneity of 12 studies was not high, these were included in a qualitative analysis, and a meta-analysis was conducted for the other nine articles.…”