How do systematic reviews differ from traditional literature reviews?
A systematic review involves the careful delineation of the research question to be addressed by the review; identification of rigorous criteria for the inclusion or exclusion of studies to be reviewed; exhaustive searches of the literature to identify potential studies for inclusion; screening of the studies according to the review criteria; and analysis and reporting of findings, including, where sufficient quantitative data are available, meta-analysis of data (Turner & Nye, 2007).