1. Clinical-Hospital Center, Pristina, Gracanica, Serbia;
2. Medical Faculty in Kosovska Mitrovica, Univeristy of Priština, Kosovska Mitrovica, Serbia;
3. Faculty of Sport and Physical Education Leposavic, University of Pristina, Pristina, Serbia;
4. Faculty of Medicine, University of Niš, Nis, Serbia;
5. Department of Biochemistry, Faculty of Medicine, University of Niš, Niš, Serbia;
6. Department of Chemistry, Faculty of Medicine, University of Niš, Niš, Serbia