1. Faculty of Medicine, Department for Infectious Diseases, University of Belgrade, 11000 Belgrade, Serbia
2. University Clinic for Infectious and Tropical Diseases, University Clinical Center of Serbia, Bulevar Oslobodjenja 16, 11000 Belgrade, Serbia
3. Faculty of Medicine, University of Pristina Situated in Kosovska Mitrovica, 28000 Kosovska Mitrovica, Serbia