1. Faculty of Medicine, Clinic for Infectious Diseases, University of Novi Sad, Novi Sad, Serbia
2. Division of Gastroenterology, La Sapienza University, Umberto I University Hospital, Rome, Italy
3. Faculty of Medicine, Department of Pharmacy, University of Novi Sad, Novi Sad, Serbia
4. Department of Health Sciences, University Magna Graecia, Catanzaro, Italy