1. Department of Gastroenterology and Endoscopy, IRCCS San Raffaele Hospital and Vita-Salute San Raffaele University, 20132 Milan, Italy
2. IBD Unit, Department of Gastroenterology and Digestive Endoscopy, San Camillo-Forlanini Hospital, 00152 Rome, Italy
3. Department of Gastroenterology, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
4. INSERM, NGERE, University of Lorraine, F-54000 Nancy, France
5. INFINY Institute, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
6. FHU-CURE, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
7. Groupe Hospitalier Privè Ambroise Parè—Hartmann, Paris IBD Center, 92200 Neuilly sur Seine, France
8. Division of Gastroenterology and Hepatology, McGill University Health Center, Montreal, QC H4A 3J1, Canada