Screening process and study selection
There were no restrictions on the article’s publication date, but only studies written in English were selected. Searchers were performed by one of the authors. All potentially English relevant articles retrieved from each database were screened. Two reviewers independently reviewed titles and abstracts and chose articles fitting selection criteria for full-text evaluation. Discrepancies were discussed with a third reviewer. Irrelevant articles were excluded. Based on inclusion and exclusion criteria and full-text assessment, eligible studies were identified. Then the content was analyzed, and data were extracted (Figure 1).