1. Department of Biomedical Sciences, Humanitas University, Milan, Italy
2. IBD centre, Humanitas Research Hospital - IRCCS, Rozzano, Milan, Italy
3. Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
4. Department of Gastroenterology, University Hospital of Marseille Nord, University of Aix-Marseille, Marseille, France
5. Methodology, Data Management and Statistic Unit, MPI Department, University Hospital of Nancy, Vandoeuvre-lès-Nancy, France