1 Clinical Research Fellow Cardiovascular Research Centre Royal Brompton Hospital Sydney Street, London SW3 6NP, UK Tel: +44 20 7352 8121 x 2929.
2 Professor of Cardiology, National Heart and Lung Institute, Imperial College Director, Cardiovascular Magnetic Resonance Unit Royal Brompton Hospital Sydney Street, London SW3 6NP, UK Tel: +44 20 7351 8810 Fax: +44 20 7351 8816.