“…Among 19 meta-analyses, 12 studies [ 12 , 27 , 29 , 32 ] [ 33 ], [ 35 – 38 ]; [ 7 , 11 , 24 ] showed a high risk of bias regarding eligibility criteria (due to unclear restrictions regarding publication date or language and weakly described inclusion/exclusion criteria). Six studies [ 7 , 12 , 13 , 27 , 30 , 32 ] had a high risk of bias regarding the study selection process (due to lack of specified databases' searched strategy or potential risk of selection of RCTs by only one reviewer instead of 2≤ independent reviewers). Seven studies [ 10 ]; [ 27 , 29 , 32 , 35 , 36 , 39 ] had a high risk of bias regarding the data collection step (according to unclear efforts made to minimize errors in data collection and quality assessment).…”