1. Department of Physiology, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21137 Novi Sad, Serbia
2. Health Centre Novi Sad, Bulevar Cara Lazara 75, 21102 Novi Sad, Serbia
3. Department of General Medicine and Geriatrics, Faculty of Medicine Novi Sad, University of Novi Sad, Hajduk Veljkova 3, 21137 Novi Sad, Serbia
4. Department of Biochemistry, Faculty of Medicine Novi Sad, University of Novi Sad, Hajduk Veljkova 3, 21137 Novi Sad, Serbia
5. Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21137 Novi Sad, Serbia
6. Clinic of Anesthesia and Intensive Care, University Clinical Center of Vojvodina, Hajduk Veljkova 1, 21137 Novi Sad, Serbia
7. Institute for Pulmonary Diseases of Vojvodina, Put Dr Goldmana Street 4, 21204 Sremska Kamenica, Serbia
8. Department of Pathophysiology and Laboratory Medicine, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21137 Novi Sad, Serbia
9. Center of Laboratory Medicine, Clinical Center of Vojvodina, Hajduk Veljkova 1, 21137 Novi Sad, Serbia
10. Department of Infectious Diseases, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21137 Novi Sad, Serbia
11. Clinic for Infectious Diseases, University Clinical Center of Vojvodina, Hajduk Veljkova 1, 21137 Novi Sad, Serbia