1. Institute of Hygiene and Medical Ecology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
2. Vascular Surgery Clinic, “Dedinje” Cardiovascular Institute, 11000 Belgrade, Serbia
3. Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
4. Institute of Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
5. Institute of Epidemiology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
6. Clinic of Urology, University Clinical Center of Serbia, 11000 Belgrade, Serbia