1. Diagnostic Department of Center of Stereotaxic Radiosurgery, Clinic of Neurosurgery, University Clinical Center of Serbia, 11000 Belgrade, Serbia
2. Cardiology Clinic, University Clinical Center of Serbia, 11000 Belgrade, Serbia
3. School of Medicine, University of Belgrade, 11000 Belgrade, Serbia
4. Department for Cardiac Surgery, University Clinical Center of Serbia, 11000 Belgrade, Serbia
5. Center of Radiology, University Clinical Center of Serbia, 11000 Belgrade, Serbia
6. Pacemaker Center, University Clinical Center of Serbia, School of Medicine, University of Belgrade, 11000 Belgrade, Serbia
7. Institute for Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia