1. Community Health Center Rakovica, Department of Specialist Consultancy Services, Belgrade, Serbia
2. University of Kragujevac, Faculty of Medical Sciences, Department of Hygiene and Ecology, Kragujevac, Serbia
3. University of Kragujevac, Faculty of Medical Sciences, Department of Clinical Pharmacy, Kragujevac, Serbia
4. University of Belgrade, Faculty of Medicine, Institute of Epidemiology, Belgrade, Serbia
5. Community Health Center Rakovica, Department of General Medicine, Belgrade, Serbia
6. Community Health Center Rakovica, Laboratory Department, Belgrade, Serbia