1. Department of Medicine and Surgery University of Parma Parma Italy
2. Endoscopy Unit Department of Medicine ULSS7 Pedemontana, Hospital AltoVicentino Santorso Italy
3. Department of Medicine—DIMED, Surgical Pathology and Cytopathology Unit University of Padova Padova Italy
4. Registro Tumori del Veneto (RTV) Azienda Zero Padova Italy