1. National Bowel Research Centre and GI Physiology Unit, Centre for Neuroscience, Surgery & Trauma, Blizard Institute, Queen Mary University of London, London, United Kingdom;
2. Department of Gastroenterology and Hepatology, Amsterdam University Medical Center, Amsterdam, the Netherlands;
3. Amsterdam Gastroenterology Endocrinology Metabolism Research Institute, Amsterdam, The Netherlands;
4. Department of Surgery, Oncology and Gastroenterology–DISCOG, University of Padua, Padua, Italy.