Forest Plot of the effect size (E-S) of randomized-controlled trials, non randomized-controlled trials and before-after studies. E-S corresponds to magnitude of an intervention effect. Boxes are the E-S estimates from each study. The horizontal bars are 95%CI. The size of the box is proportional to the weight of the study. The studies are sorted by weight in the plot. The table on the right side of the graph indicates whether two or more types of validity were used and what kind of intervention was used: Journal Club or workshops, or multifaceted intervention, or other interventions. ■ Yes; □ No.