Clinical data and the Literature review is a way of organising research literature and clinical data too bring out evidence for or against a product, service or intervention. These come in the form of raw data from clinical research, research articles or systematic reviews.
Randomised clinical trials are the gold standard to bring out clinical evidence but these may not achieve the intended objectives of the research. Systematic reviews will look at studies done in a similar way and analyse the level of concordance in the outcomes.