1. Department of Gastroenterology, University Hospital of Marseille Nord, University of Aix-Marseille, Marseille, France
2. Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
3. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
4. Department of Gastroenterology, Humanitas Clinical and Research Centre - IRCCS, Rozzano Milan, Italy