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