1. Department of Gastroenterology and Endoscopy, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, Italy
2. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20090 Milan, Italy
3. Hepato-Gastroenterology and Digestive Oncology, University Hospital CHU of Liège, 4000 Liège, Belgium
4. INSERM, NGERE, University of Lorraine, F-54000 Nancy, France
5. Department of Gastroenterology, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France