Selection and retrieval

The flow diagram for the screening and selection technique is depicted in the figure. Two reviewers (DLMB, AdJ) and a librarian created the search keywords (Table 1). After duplicates were eliminated, two independent reviewers (DLMB, AdJ) conducted a preliminary assessment of the abstract and title. Until complete consensus was achieved, all variances were discussed. The two reviewers then separately examined the entire texts of every other study. Once more, disagreements were discussed and settled upon when an agreement was achieved. Following the full-text screening, the risk of bias was evaluated by two reviewers (DLMB and LD). A final evaluation of the included studies was conducted by three reviewers (DLMB, AdJ, and LD).