“…Overall, the most common design used in the studies was the controlled before-after design, wherein researchers used historical controls prior to the implementation of an intervention. Of the 78 studies, 61 (78.2%) were some form of controlled before-after study [13-18,20-27,29,30,32-37,39-51,54,55],[57,60,61,64,65,68-70,72-78,82-90]. Only 12 (15.4%) of the studies were randomized controlled trials (RCTs) [19,28,31,38,53,59,62,63],[71,79-81].…”