- Correspondence to Dr I S Malik, Imperial College Healthcare NHS Trust, Praed Street, London W2 1NY, UK;
- Accepted May 19, 2009
- First published June 29, 2009.
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.