Evidence Aid summaries have been written by staff and volunteers of Evidence Aid in order to make the content of the original document accessible to decision makers who are searching for available evidence but may not have the time, initially, to read the original report in full.

The summaries are not intended as a substitute for the medical advice of physicians, other health workers, professional associations, guideline developers, or national governments and international agencies. If readers of these summaries think that the evidence that is presented within them is relevant to their decision-making they should refer to the content and details of the original article, and the advice and guidelines offered by other sources of expertise, before making decisions. Evidence Aid cannot be held responsible for any decisions made on the basis of these summary alone.