Prior to starting a systematic review you need to find out if a systematic review has been done or is under way. Checking registers, such as PROSPERO, is important in ensuring that you aren't repeating a review that has been done or registered.
Published reviews also provide a useful starting point for identifying studies in your area of research.
Some databases focus specifically on indexing evidence-based medicine, systematic reviews, etc. e.g. Cochrane databases
You can also search the larger subject databases such as MEDLINE, CINAHL, PsycINFO and limit the search to "systematic review". Some databases have a filter or limit option to limit the search to 'systematic review'.
It's also useful to search the large multidisciplinary citation databases Web of Science and Scopus, particularly if your research is cross-disciplinary.
Many of the clinical trial registers include information about trials that are in progress as well as those that have been completed, for example:
When using this Database it is best to select the MULTI-FIELD SEARCH Option
EPPI-Centre is part of the Social Science Research Unit at the Institute of Education, University of London. It conducts systematic reviews across a range of topics and works with a large number of funders.
Major areas include:
Full reviews can be found in the Centre’s online Evidence Library.
The Campbell Collaboration is an international research network that produces systematic reviews of the effects of social interventions in education, crime and justice, social welfare and international development.
Published issues of Campbell systematic reviews:
Full reports are published online in the Campbell Library.
Edith Cowan University acknowledges and respects the Noongar people, who are
the traditional custodians of the land upon which its campuses stand and its programs
In particular ECU pays its respects to the Elders, past and present, of the Noongar people, and embrace their culture, wisdom and knowledge.