“…The remaining 511 entries were then screened by title and abstract, with the subsequent removal of 477 items (55.9%). The remaining 34 entries (4.0% of the initial sample) were full-text reviewed [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. Of them, 20 were excluded from the final pool (2.3%), which only contained 14 articles (1.6% of the initial sample), whose content was included in both qualitative and quantitative analyses [ 8 , 13 , 29 , 30 , 32 , 33 , 34 , 35 , 37 , 38 , 41 , 42 , 43 , 47 ].…”