From the Menzies Research Institute Tasmania, University of Tasmania, Hobart, Australia (T.H.M.); Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford, United Kingdom (S.N.); NIHR Cardiovascular Biomedical Research Unit at Barts, The London Chest Hospital, London, United Kingdom (S.E.P.); and Queen Mary, University of London, London, United Kingdom (S.E.P.).