1. Inserm U954 and Department of Gastroenterology; Nancy University Hospital; Université de Lorraine; Vandouvre-lès-Nancy France
2. Inserm U954 and Department of Digestive Surgery; Nancy University Hospital; Université de Lorraine; Vandoeuvre-lès-Nancy France
3. DRG Abacus; Bicester UK
4. Department of Gastroenterology; Barts Health NHS Trust; The Royal London Hospital; London UK