1. Department of Medicine (DIMED), Surgical Pathology and Cytopathology Unit; University of Padova; Padova Italy
2. Veneto Tumor Registry (RTV); Veneto Regional Authority; Padova Italy
3. Department of Medicine; Jichi Medical University; Tochigi Japan
4. Department of Medicine and Surgery, Clinical Pharmacology and Pathophysiology Unit; School of Medicine and Dentistry; University of Parma; Parma Italy
5. Gastroenterology Division; Honorio Delgado Hospital; Arequipa Peru
6. Department of Translational Research and of New Surgical and Medical Technologies, Pathology Section; University of Pisa; Pisa Italy