- Correspondence to Dr Sonia Bouri, International Centre for Circulatory Health, National Heart and Lung Institute, Imperial College London, St Mary's Hospital, 59-61 North Wharf Road, London W2 1LA, UK;
- Received 11 May 2013
- Revised 11 July 2013
- Accepted 12 July 2013
- Published in print 30 July 2013.
- Published online 31 July 2013.
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