1. I Clinica Medica, Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
2. First Department of Internal Medicine, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
3. Division of Gastroenterology and Hepatology, Digestive Health Center, University of Virginia, Charlottesville, Virginia, United States
4. Department of Medical and Surgical Sciences, University of Catanzaro, Catanzaro, Italy
5. Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
6. Unit of Internal Medicine 2, Department of Medical and Surgical Science for Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
7. Department of Public Health and Infectious Disease, Sapienza University of Rome, Rome, Italy
8. Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy