1. Digestive Pathophysiology Unit; Baggiovara Hospital; Modena Italy
2. Digestive Endoscopy Unit; Baggiovara Hospital; Modena Italy
3. Department of Medical and Surgical Sciences; University of Bologna; Bologna Italy
4. Department of Pathology; University of Modena-Reggio Emilia; Modena Italy
5. Department of Surgery; Baggiovara Hospital; Modena Italy