1 Department of Surgery, Unit of Clinica Chirurgica, S. Anna University Hospital of Ferrara, and University of Ferrara, Via Aldo Moro, 8 Room 2 34 03 (1C2), Ferrara, Cona, 44124, Italy
2 Department of Medicine, Unit of Gastroenterology, S. Anna University Hospital of Ferrara, Ferrara, Italy
3 Department of Diagnostic Imaging and Laboratory Medicine, Unit of Anatomic Pathology, S. Anna University Hospital of Ferrara, and University of Ferrara, Ferrara, Italy
4 Unit of Statistics, S. Anna University Hospital of Ferrara, Ferrara, Italy