“…Of these, eight studies were excluded [ 12 , 14 , 39 , 40 , 41 , 42 , 43 , 44 ]. Exclusion reasons are shown in the PRISMA flow diagram of the review ( Figure 1 ), which resulted in a total of 16 articles for the qualitative analysis [ 3 , 13 , 16 , 18 , 20 , 21 , 23 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. Considering the high heterogenicity of the studies included, a meta-analysis could not be performed.…”