1 Faculty of Medicine, Department for Dentistry, University of Pristina, Kosovska Mitrovica, Serbia.
2 Center for Rehabilitation Medicine, Faculty of Medical Sciences, University Clinical Center Kragujevac, University of Kragujevac, Kragujevac, Serbia.
3 Department of Dentistry, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.
4 Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.