A literature review is intended to provide a summary of research on a topic. Systematic Reviews follow specific protocols with the aim of providing a comprehensive picture of current research and minimizing bias. 

The literature search process of a review should be clearly documented in the methods section and include:

• search terms (including keywords and formal subject headings)
• databases used
• additional search strategies (such as citation chasing)
• inclusion and exclusion criteria for determining relevant sources

The documents below will help you think through building a comprehensive search strategy.