1. St Bartholomew’s Hospital, Barts Health NHS Trust, London EC1A 7BE, UK
2. Heart Foundation, Level 2 850 Collins Street, Docklands, VIC 3008, Australia
3. Lay Representative Group, Society of Cardiothoracic Society of Great Britain and Ireland, 35-43 Lincoln’s Inn Fields, London WC2A 3PE, UK
4. Western Sydney Nursing & Midwifery Research Centre, Research & Education Network WSLHD and Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
5. Department of Medical Statistics, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
6. William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK