1. Institute for Oncology and Radiology of Serbia
2. Department of Medicine, Faculty of Hotel Management and Tourism, University of Kragujevac
3. Department of Clinical Pharmacology, Clinical Centre “Kragujevac”, Faculty of Medical Science, University of Kragujevac
4. Clinic for Psychiatry, Clinical Centre “Kragujevac”, Faculty of Medical Sciences, University of Kragujevac
5. Department of Biochemistry, Faculty of Medical Sciences, University of Kragujevac
6. Public Health Institute Kragujevac, Faculty of Medical Sciences, University of Kragujevac