1. Gastroenterology Unit, Department of Surgery, Oncology and Gastroenterology, University of Padua, Via Giustiniani 2, Padua 235128, Italy
2. Gastroenterology Unit, Azienda Ospedale Università Padova, Padova, Italy
3. Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
4. Unit of Biostatistics, Epidemiology and Public Health, Department of Cardio-Thoraco-Vascular Sciences and Public Health, University of Padua, Padua, Italy