State how studies were screened and selected using the pre-defined inclusion / exclusion criteria. Describe the study quality assessment criteria, the application of those criteria to studies and the interrater reliability between the primary and second reviewers.
Include details of data sources, the time span of the literature covered for each source and the date/week(s) when the searches were carried out. The sources are usually presented in the following order: List all search terms in this section and put the actual syntax in the appendix. This is crucial and syntax must be […]