The Cochrane Collaboration"Cochrane is an international network of more than 31,000 dedicated people from over 120 countries. We work together to help healthcare practitioners, policy-makers, patients, their advocates and carers, make well-informed decisions about health care, by preparing, updating, and promoting the accessibility of Cochrane Reviews – over 5,000 so far, published online in the Cochrane Database of Systematic Reviews, part of The Cochrane Library. We also prepare the largest collection of records of randomised controlled trials in the world, called CENTRAL, published as part of The Cochrane Library. Our work is internationally recognised as the benchmark for high quality information about the effectiveness of health care."