Cochrane Database of Systematic Reviews
Cochrane Reviews are systematic reviews of primary research in human health
care and health policy, and are internationally recognised as the highest standard in evidence-based health care. They investigate the effects of interventions for prevention, treatment and rehabilitation. They also assess the accuracy of a diagnostic test for a given condition in a specific patient group and setting. The Cochrane Collaboration, established in 1993, is an international network of more than 28,000 dedicated people from over 100 countries. We work together to help health care providers, policy-makers, patients, their advocates and carers, make well-informed decisions about health care, based on the best available research evidence, by preparing, updating and promoting the accessibility of Cochrane Reviews.