1. Department of Vascular Surgery, Dedinje Cardiovascular Institute, Belgrade, Serbia
2. Faculty of Medicine, University of Belgrade, Belgrade, Serbia
3. Institute of Epidemiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
4. Institute of Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
5. Institute of Hygiene and Medical Ecology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia