1. St Mary’s Academic Unit, Imperial College London, UK
2. Department of Medicine, Imperial College London, UK
3. Magill Department of Anaesthesia, Intensive Care and Pain Management, Chelsea and Westminster Hospital, UK
4. Department of Medicine, University of Cambridge, UK
5. Hull York Medical School, University of York, UK
6. Department of Upper GI and Bariatric Surgery, St George’s University of London, UK
7. Royal Brompton Hospital and National Heart and Lung Institute, Imperial College London, UK