1. Gastroenterology and Endoscopy IRCCS Ospedale San Raffaele and Vita‐Salute San Raffaele University Milan Italy
2. Department of Biomedical Sciences Humanitas University Milan Italy
3. Department of Gastroenterology University Hospital of Marseille Nord University of Aix‐Marseille Marseille France
4. Department of Gastroenterology Centro Hospitalar São João Porto Portugal
5. Department of Gastroenterology University of Lorraine CHRU‐Nancy Nancy France
6. University of Lorraine Inserm NGERE Nancy France