1. Department of Gastroenterology & Endoscopy, IRCCS San Raffaele Hospital & Vita-Salute San Raffaele University, Milan, Italy
2. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
3. Department of Gastroenterology, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain; Aragón Health Research Institute, Zaragoza, Spain; School of Medicine, University of Zaragoza, Spain
4. University of Lorraine, Inserm, NGERE, F-54000 Nancy, France
5. Department of Gastroenterology, Nancy University Hospital, F-54500 Vandœuvre-lès-Nancy, France