“…Of the 35 included trials, 11 did not have data to be entered in the meta-analysis because they presented the results only in figures or graphs or because the data were not usable for statistical analysis. [32][33][34][35][36][37][38][39][40][41]43,44 Of the 24 studies entered into the meta-analysis, 42,[45][46][47] 12 compared an active intervention with placebo, [11][12][13]15,18,19,21,[23][24][25][26]28,30,47 five compared two active interventions, 14,17,22,27,31,42,45,46 and the three remaining trials compared an intervention with no treatment. 16,20,29 For further details, see Table S3.…”