“…They aim to collate and analyse all the current evidence on a specific area. 7,8 The stages involved include formulating a review question, defining search criteria, defining inclusion and exclusion criteria, developing and registering a protocol, conducting a systematic search of databases, reviewing and identifying studies for inclusion, documenting reasons for exclusion, assessing quality of studies, extracting data, analysing and synthesising data and drawing conclusions. They usually have more than one researcher duplicating methodology to increase the reliability and validity of findings.…”