“…Concerning the design of the included studies, 15 were observational longitudinal studies (cohorts), including prospective (14 studies) [ 5 , 9 , 19 , 27 , 37 , 42 , 44 , 53 , 54 , 55 , 56 , 57 , 59 , 60 ] and one retrospective design [ 24 ]. Seven were designed as cross-sectional observational studies [ 13 , 15 , 17 , 31 , 32 , 34 , 45 ], one study was a quasi-experimental pre-post design [ 58 ], and three out of the 26 studies were randomized controlled trials [ 16 , 20 , 23 ].…”