“…Of the 40 studies included, 17 studies [ 5 , 13 , [23] , [24] , [25] , [27] , [28] , [29] , 34 , 37 , 39 , 40 , 47 , 48 , 52 , 56 , 59 ] were considered to be at low risk of bias in random sequence generation, 14 studies [ 5 , 13 , [23] , [24] , [25] , 28 , 29 , 33 , 34 , 37 , 47 , 52 , 56 , 59 ] were considered to be at low risk of bias in allocation concealment, all studies [ 5 , 13 , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] , [51] , [52] , [53] , [54] , …”