“…Of the 60 studies included, 50.0% (n = 30) were randomized controlled trials, 28 , 29 , 33–36 , 39 , 43 , 45–47 , 50 , 53 , 54 , 61–64 , 68–74 , 76 , 80 , 83 , 84 , 86 23.3% (n = 14) were non-randomized trials, 30 , 31 , 37 , 40 , 48 , 49 , 51 , 56–58 , 60 , 75 , 77 , 78 11.7% (n = 7) were cohort studies, 27 , 42 , 52 , 59 , 66 , 67 , 79 8.3% (n = 5) were before-and-after studies, 32 , 41 , 55 , 81 , 82 5.0% (n = 3) were quasi-randomized trials, 38 , 44 , 85 and 1.7% (n = 1) were case-control studies. 65 The majority of studies (53.3%, n = 32/60) were conducted in the United States of America (USA).…”