1. Division of Gastroenterology, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
2. Division of Pharmacology, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
3. Division of Gastroenterology, Department of Internal Medicine, University of Genoa, Genoa, Italy
4. Division of Gastroenterology, Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy