Unpublished research (grey litterature) and systematic review about your research subject can be obtained in the following databases:
1) The NHS archives from early 2000 up to september 2007:
2) Current archives of the clinical research studies supported by the NHS:
3) Systematic reviews on effects of interventions used in health and social care, on health technology assesment and on economic evaluation :
4) Systematic reviews about health and social care evidence to support decision making.