Search these databases for journal articles. Sometimes instead of a complete (full text) article, you'll only be able to access an abstract or citation.
Citations, abstracts, and some full-text articles from scholarly and professional journals in health and medicine; uses Medical Subject Headings (MeSH)
-A systematic review answers a defined research question by collecting and summarising all empirical evidence that fits pre-specified eligibility criteria.
-A meta-analysis is the use of statistical methods to summarise the results of these studies.