1. St. Bartholomew’s Hospital/Barts Heart Centre, West Smithfield, London, UK
2. Royal Free London NHS Foundation Trust, Royal Free Hospital, Pond Street, London, UK
3. Radcliffe Department of Medicine, Oxford Centre for Clinical Magnetic Resonance Research, John Radcliffe Hospital, Headington, Oxford, UK
4. Cardiorespiratory Unit, Great Ormond Street Hospital, Great Ormond St, London, UK
5. Division of Cardiology, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Main Rd, Observatory, Cape Town, South Africa
6. The Hatter Institute, Faculty of Health Sciences, University of Cape Town, 4th Floor Chris Barnard Building, Private Bag, Observatory, South Africa
7. Cape Universities Body Imaging Centre, University of Cape Town, UCT MRI Unit 10, J Block, Groote Schuur Hospital, Observatory, Cape Town, South Africa