1. Department of Gastroenterology and Endoscopy, IRCCS Ospedale San Raffaele, Vita-Salute San Raffaele University, 20132 Milan, Italy
2. Department of Gastroenterology and Endoscopy, Santa Casa de Misericordia de Porto Alagre, Porto Alegre 90020-090, Brazil
3. Department of Gastroenterology and Digestive Endoscopy, San Camillo-Forlanini Hospital, 00152 Rome, Italy
4. Department of Gastroenterology, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
5. INSERM, Nutrition-Genetics and Exposure to Environmental Risks Research Unit (NGERE), University of Lorraine, F-54000 Nancy, France
6. INFINY Institute, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
7. Fédération Hospitalo-Universitaire CARE, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France
8. Groupe Hospitalier Privé Ambroise Paré—Hartmann, Paris IBD Center, F-92200 Neuilly sur Seine, France
9. Division of Gastroenterology and Hepatology, McGill University Health Centre, Montreal, QC H4A 3J1, Canada