2.3. Screening of Results
After retrieving the search results, the included articles were screened through two steps. The first step comprised title and abstract screening. Preliminary included articles from the first step entered step two which involved full-text screening. We obtained the full-text for all included studies and carefully examined them for final inclusion. Additionally, we screened the references of the included research studies. One screened abstract prompted us to identify a relevant RCT that was posted in a preprint server and we eventually included it in our analysis.24