1. 1Department for Cardiovascular Diseases, Clinical center Niš, Bulevar Dr Z.Djindjića 48, 18000 Niš, Serbia
2. 2Medical Faculty, University of Niš, Bulevar Dr Zorana Djindjića 81, 18 000 Niš, Serbia
3. 3 Department of Clinical Pharmacology, Clinical center Niš, Bulevar Dr Zorana Djindjića 48, 18 000 Serbia
4. 4Institute for therapy and prevention Niška Banja, Srpskih junaka 2, 18 205 Niška Banja, Serbia
5. 5Clinical Hospital Center Bežanijska kosa, Faculty of Medicine, Univesirty of Belgrade, Bežanijska kosa bb, 11 000 Belgrade, Serbia
6. 6School of Medicine, Belgrade, Clinic of Cardiology, Clinical Centre of Serbia, Pasterova 2, 11 000 Belgrade, Serbia
7. 7Military Hospital Niš, Bulevar Dr Zorana Đinđića bb, 18 000 Niš, Serbia