Marc George, consultant in clinical pharmacology1, Sama ElSayed, junior clinical fellow1, Cormac Magee, consultant in gastroenterology2, Marie Elsya Speechly-Dick, cardiology consultant3 1Department of Clinical Pharmacology and Therapeutics, University College London Hospitals NHS Foundation Trust, London, UK 2Department of Gastroenterology, University College London Hospitals NHS Foundation Trust, London, UK 3Cardiology Department, University College London Hospitals NHS Foundation Trust,...