- Correspondence to Susanna T Walker, Centre for Patient Safety and Service Quality, Department of Surgery and Cancer, Imperial College London, St Mary's Hospital, QEQM Building, London W2 1NY, UK;
- Received March 14, 2012
- Revised July 12, 2012
- Accepted November 2, 2012
- First published December 4, 2012.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.