1. Department of Surgery, University of Padua, OOT, Via Facciolati 71, 35127 Padova, Italy
2. Department of Internal Medicine – Gastroenterology, University of Padua, OOT, Via Facciolati 71, 35127 Padova, Italy
3. Department of Pathology, University of Padua, OOT, Via Facciolati 71, 35127 Padova, Italy
4. Department of Hygiene and Medical Statistics, University of Padua, OOT, Via Facciolati 71, 35127 Padova, Italy