Author(s):
1. Jelena Živković, University of Niš Faculty of Medicine, Serbia
2. Milena Radenković, University of Niš Faculty of Medicine, Serbia
3. Sanja Stojanović, University of Niš Faculty of Medicine, Serbia
4. Jelena Najdanović, University of Niš Faculty of Medicine, Serbia
5. Vladimir Cvetković, University of Nis, Faculty of Sciences and Mathematics, ::Visegradska 33, Serbia
6. Marija Vukelić-Nikolić, Institut za biologiju i humanu genetiku, Medicinski fakultet, Univerzitet u Nišu, 1800 Niš, Srbija, Serbia
7. Ivica Vučković, Clinic for dental medicine, Niš, Serbia
8. Nenad Ignjatović, Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, Belgrade, Serbia, Serbia
9. Stevo Najman, Faculty of Medicine, University of Niš, Serbia

Abstract