“…For the "unbiased study endpoints" domain, the risk of bias was low in 14 studies [13,14,17,18,20,24,[29][30][31][32][33]37,39,40,42], unclear in 11 studies [15,16,19,22,23,[26][27][28]34,35], and high in six studies [12,21,25,36,38,41]; in particular, in the studies at high risk of bias, Colman and Rosenthal's criteria were only partially fulfilled.…”