1. Department of Gastroenterology and Endoscopy, IRCCS San Raffaele Hospital, 20132 Milan, Italy
2. Department of Gastroenterology, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
3. Inserm, NGERE, University of Lorraine, F-54000 Nancy, France
4. INFINY Institute, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
5. FHU-CURE, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
6. Groupe Hospitalier Privé Ambroise Paré-Hartmann, Paris IBD Center, F-92200 Neuilly sur Seine, France
7. Division of Gastroenterology and Hepatology, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
8. Department of Gastroenterology and Endoscopy, Vita-Salute San Raffaele University, 20132 Milan, Italy