1. Department of Gastroenterology & Endoscopy, IRCCS San Raffaele Hospital & Vita-Salute San Raffaele University, 20132 Milan, Italy
2. Gastroenterology Unit, Foundation Policlinico San Matteo IRCCS, University of Pavia, 27100 Pavia, Italy
3. IBD Unit, Department of Gastroenterology & Digestive Endoscopy, San Camillo-Forlanini Hospital, 00152 Rome, Italy
4. Department of Gastroenterology, Nancy University Hospital, INSERM, NGERE, University of Lorraine F-54500 Vandœuvre-lès-Nancy, France
5. INFINY Institute, FHU-CURE, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
6. Groupe Hospitalier privè Ambroise Parè – Hartmann, Paris IBD center, 92200 Neuilly sur Seine, France
7. Division of Gastroenterology & Hepatology, McGill University Health Center, H3A 0G4 Montreal, Quebec, Canada