1. University of Banja Luka, Faculty of Medicine, Department of Dental Diseases, Banja Luka, Republika Srpska, Bosnia and Herzegovina
2. University of Belgrade, Faculty of Dentistry, Clinic for Dental Diseases, Belgrade, Serbia
3. University of Banja Luka, Faculty of Medicine, Department of Jaw Orthopedics, Banja Luka, Republika Srpska, Bosnia and Herzegovina