1. 1Institute for Treatment and Rehabilitation from Cardiovascular Diseases “Niška Banja”, Niš, Serbia
2. 2Department of Cardiovascular Diseases, Clinical Center, Niš, Serbia
3. 3Institute of Nephrology and Hemodialisys, Faculty of Medicine, University of Niš, Niš, Serbia
4. 4School of Medicine, University of Banja Luka, Banja Luka, Bosnia and Herzegovina
5. 5Department of Clinical Research, Faculty of Medicine, University of Niš, Niš, Serbia