1. Department of Emergency Medicine, University Clinical Center Kragujevac, 34000 Kragujevac, Serbia
2. Health Sciences Campus, Loyola University Chicago, Maywood, IL 60153, USA
3. Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
4. Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, 34000 Kragujevac, Serbia
5. Department of Internal Medicine, Faculty of Medical Sciences, University of Kragujevac, 34000 Kragujevac, Serbia
6. Clinic of Cardiology, University Clinical Center Kragujevac, 34000 Kragujevac, Serbia
7. Department of Medicine, School of Medicine, European University Cyprus, 2404 Nicosia, Cyprus