1. Hepato-Gastroenterology and Digestive Oncology, University Hospital CHU of Liège, Liège, Belgium
2. Department of Gastroenterology, INFINY Institute, INSERM NGERE, CHRU Nancy, Vandœuvre-lès-Nancy, France
3. Groupe Hospitalier privé Ambroise Paré - Hartmann, Paris IBD center, Neuilly sur Seine, France
4. Division of Gastroenterology and Hepatology, McGill University Health Centre, Montreal, Quebec, Canada