- Correspondence to Professor Timothy John Williams, National Heart and Lung Institute, Faculty of Medicine, Imperial College London, SAF Building, South Kensington, London SW72AZ, UK;
- Received 25 June 2012
- Accepted 7 August 2012
- Published online 14 November 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.