3.1 Search and study selection results
A total number of 2,050 pertinent results were found across all the searches performed. After restricting the searches to RCTs within the databases, this number was eventually reduced to 1,405 citations. After removing the duplications, 562 citations were retrieved to enable the screening of each result’s title and abstract. A total of 37 full text articles were identified as being relevant to the topic. After the inclusion and exclusion criteria were applied to the 37 relevant trials, only 7 trials which met the criteria were included in the review. In addition, three studies were identified through reviewing the reference lists from the included trials. However, they were all excluded after the eligibility criteria were applied to them. Figure 1 represents the flow chart of the study selection process.