1. 1British Heart Foundation Cardiovascular Research Centre, University of Leicester, Glenfield Hospital, Leicester, UK
2. †(E Levelt is now at Multidisciplinary Cardiovascular Research Centre and Biomedical Imaging Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK)
3. 2University of Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Division of Cardiovascular Medicine, Radcliffe Department of Medicine, Oxford, UK