1. ATS Lecco-Brianza, Limbiate (Monza Brianza), Italy
2. University of Rome, Italy
3. Prevention and Vaccination Center, Corberi-Antonini Hospital - ASST Monza, Limbiate (Monza Brianza), Italy
4. Gastroenterology, Hepatology and Digestive Endoscopy Section, Department of Medicine, University of Perugia – Medicine, Perugia, Italy
5. Dipartimento Biomedico di Medicina Interna e Specialistica (DiBiMIS), University of Palermo, Palermo, Italy
6. Pathology Department, Spedali Civili Brescia, Brescia, Italy
7. Internal Medicine, Giovanni Paolo II Hospital, Sciacca (ASP Agrigento), Italy