- Correspondence to Dr James P Howard, International Centre for Circulatory Health, National Heart and Lung Institute, Imperial College London, 59-61 North Wharf Road, London W2 1LA, UK;
- Received 2 May 2013
- Revised 5 August 2013
- Accepted 7 August 2013
- Published online 6 October 2013.
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.