“…A total of 50 articles were included in the qualitative analysis. Of these, 5 articles were not considered for the meta-analysis because two of them did not express the BS data as means and SDs [ 76 , 77 ], and in 3 articles the number of specimens used could not be retrieved [ 78 , 79 , 80 ], totalling 45 articles considered for the quantitative analysis [ 17 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 ]. A flowchart designating the study selection process according to the PRISMA statement is presented in Figure 1 .…”