“…The selected studies are characterized by their extreme heterogeneity in terms of study design, type and size of populations studied, their purpose, and outcomes. Of the 35 included studies, most of them were observational studies without a control group ( n = 22) [ 30 , 50 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 ], four were quasi-experimental prospective controlled studies [ 92 , 93 , 94 , 95 ], four were cross-sectional studies [ 96 , 97 , 98 , 99 ] and five were randomized control trials (RCTs) [ 18 , 100 , 101 , 102 , 103 ].…”