[1] UCL, Inst Cardiovasc Sci, Gower St, London WC1E 6BT, England
[2] St Bartholomews Hosp, Barts Heart Ctr, Cardiovasc Magnet Resonance Imaging Unit, London, England
[3] St Bartholomews Hosp, Barts Heart Ctr, Inherited Cardiovasc Dis Unit, London, England
[4] Queen Mary Univ London, William Harvey Inst, London, England
[5] NHLBI, DHHS, NIH, Bldg 10, Bethesda, MD 20892 USA
[6] Royal Free London NHS Fdn Trust, Dept Cardiol, Inherited Heart Muscle Condit Clin, Hampstead, England
[7] UCL, MRC Unit Lifelong Hlth & Ageing, London, England