“…The PRISMA flow diagram ( Figure 1 ) summarizes the study screening process. A summary of the studies included in this systematic review and the grading of evidence is reported in Table 1 [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ].…”