1. Digestive Disease Center, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Catholic University of Rome, Italy
2. Department of Gastroenterology, St Mary’s Hospital, London, UK
3. Division of Digestive Diseases, Department of Metabolism, Digestion & Reproduction, Faculty of Medicine, Imperial College London, London, UK
4. University of Birmingham Microbiome Treatment Centre, University of Birmingham, Birmingham, UK
5. Department of Gastroenterology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK