British Medical Journal
BMA House Tavistock Square
The BMJ is published by BMJ Publishing Group Ltd, a wholly owned subsidiary of the British Medical Association. The BMA grants editorial freedom to the Editor of the BMJ. The views expressed in the journal are those of the authors and may not necessarily comply with BMJ policy. The BMJ follows guidelines on editorial independence produced by the World Association of Medical Editors (www.wame.org/wamestmt.htm#independence) and the code on good publication practice produced by the Committee on Publication Ethics (www.publicationethics.org.uk/guidelines). Vision To be the world's most influential and widely read medical journal. Mission To lead the debate on health, and to engage, inform, and stimulate doctors, researchers and other health professionals in ways that will improve outcomes for patients.