1. University of Novi Sad, Faculty of Medicine, Novi Sad, Serbia + Institute of Cardiovascular Diseases of Vojvodina, Clinic of Cardiology, Sremska Kamenica, Serbia
2. Institute of Cardiovascular Diseases of Vojvodina, Clinic of Cardiology, Sremska Kamenica, Serbia
3. Institute of Cardiovascular Diseases of Vojvodina, Clinic of Cardiology, Sremska Kamenica, Serbia + University Business Academy in Novi Sad, Faculty of Pharmacy Novi Sad, Serbia