1. University of Novi Sad, Faculty of Medicine, Novi Sad + Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica
2. University of Novi Sad, Faculty of Medicine, Novi Sad + University Clinical Center of Vojvodina, Novi Sad
3. Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica + University Clinical Center of Vojvodina, Novi Sad
4. Institute of Cardiovascular Diseases of Vojvodina, Sremska Kamenica
5. University of Novi Sad, Faculty of Medicine, Novi Sad + Institute of Oncology of Vojvodina, Sremska Kamenica