“…As shown in Figure 1 , the 39 studies used a broad range of research designs; nineteen randomized controlled trials (RCTs) [ 2 , 7 , 29 , 30 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ], eighteen non-randomized observational studies (e.g., prospective and retrospective cohort studies, case studies, quasi-experimental studies) [ 1 , 3 , 5 , 10 , 14 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ], and two secondary analyses of RCTs [ 66 , 67 ] met the inclusion criteria. The final 39 articles were tabled and analyzed according to the level of hierarchy ( Table 1 below and supplementary material Table S1 : Characteristics of Included Studies).…”