1. Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, UK (T.A.M., L.E.D., J.R.J.F., P.B., G.R.L., J.P.G.).
2. Barts Health National Health Service Trust and University College London, UK (T.A.T., G.C., S.P., J.C.M.).
3. Imperial College London and Royal Brompton Hospital, UK (V.S.V., T.M., S.K.P.).
4. University of Leicester and the National Institute for Health Research Leicester Biomedical Research Centre, Glenfield Hospital, UK (A.S., G.P.M.).
5. Centre for Cardiovascular Science, University of Edinburgh, UK (C.C., M.D.).
6. University of Oxford Centre for Clinical Magnetic Resonance Research, UK (M.L., M.R., S.G.M.).
7. School of Health and Social Care, University of Lincoln, UK (G.R.L.).