Systematic Review: A summary of the medical literature that uses explicit methods to perform a comprehensive literature search and critical appraisal of individual studies and uses appropriate statistical technques to combine these valid studies. (Centre of Evidence-based Medicine Toronto. Glossary of EBM terms.[cited 2012 Jul 2]; Available from: http://ktclearinghouse.ca/cebm/glossary/#glossary_s)
Systematic Literature Review: A systematic,explicit, comprehensive, and reproducible method for identifying, evaluating, and synthesising the existing body of completed and recorded work produced by researchers, scholars, and practitioners. (Okoli, Chitu and Schabram Kira, A Guide to Conducting a Systematic Literature Review of Information Systems Research (May 5, 2010). Sprouts: Working Papers on Information Systems, Vol.10, p.26, 2010.
Rapid Review: A brief synthesis and judgement of the available research evidence related to a specific question posed by policy officers. The research evidence is drawn primarily from existing systematic reviews, meta-analyses and economic evaluations.(Department of Health and Human Services, State Government of Victoria, Australia,. Rapid reviews. [updated 2014, May 15; cited 2015 Jul 15]; Available from: www.health.vic.gov.au/prevention/evidence/rapid-reviews.htm)
Integrative Review: The broadest type of research review methods allowing for the simultaneous inclusion of experimental and non-experimental research in order to more fully understand a phenomenon of concern. Integrative reviews may also combine data from the theoretical as well as empirical literature. (Whittemore R, Knafl K. The integrative review: updated methodology. J Adv Nurs. 2005 [cited 2015 July 17];52(5):546-53. doi:10.1111/j.1365-2648.2005.03621.x )