1. Cardiology Research Department, Eastbourne District General Hospital, East Sussex Hospitals NHS Trust, Eastbourne, United Kingdom
2. Institute of Cardiovascular Science, University College London, London, United Kingdom
3. Mid and South Essex NHS Foundation Trust, Essex Cardiothoracic Centre, Basildon, United Kingdom
4. Retired
5. Institute for Clinical Trials and Methodology, University College London, London, United Kingdom
6. Circulatory Health Research Group, Medical Technology Research Centre, School of Medicine, Anglia Ruskin University, Chelmsford, United Kingdom
7. Nottingham University Hospital NHS Trust, Nottingham, United Kingdom