1. Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
2. College for Preschool Teachers, Krusevac, Serbia
3. Department of Microbiology and Immunology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
4. Department of Genetics, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
5. Department of Internal Medicine, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
6. Doctoral Academic Studies, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
7. Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Kragujevac, Serbia
8. Medical Clinic Euromedik, Beograd, Serbia