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