Figure 1.
The diagram presents the process used to identify, screen, and include studies. Two parallel paths show studies identified from databases and studies identified from other methods. The left path lists peer reviewed records from multiple databases with numerical counts, records removed, screened, excluded, sought for retrieval, not retrieved, assessed for eligibility, excluded for stated reasons, and studies included. The right path lists records identified through citation searching, Google entries, trial registries, and clinical sources, followed by numerical counts for records removed, screened, assessed for eligibility, excluded, and included. Both paths lead to a total number of included studies shown at the bottom.PRISMA diagram of the phases of the review process and record selection
Source: Created by authors