1. Institute of Epidemiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
2. The College of Health Sciences, Academy of Applied Studies Belgrade, Belgrade, Serbia
3. Department of Anatomy, University of Pristina temporarily settled in Kosovska Mitrovica, Kosovska Mitrovica, Serbia
4. Department of Preventive Medicine, University of Pristina temporarily settled in Kosovska Mitrovica, Kosovska Mitrovica, Serbia