Søren S Olesen1, Clive D Jackson2, Marsha Y Morgan3. 1. Mech-Sense, Department of Gastroenterology and Hepatology, Aalborg University Hospital, Denmark. 2. Department of Neurophysiology, Royal Free Hospital, Royal Free London NHS Foundation Trust, Hampstead, London, UK. 3. UCL Institute for Liver & Digestive Health, Division of Medicine, Royal Free Campus, University College London, Hampstead, London, UK. Electronic address: marsha.morgan@ucl.ac.uk.