1 Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia; Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia.
2 Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia.
3 Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia; Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica, Serbia. Electronic address: [email protected].