1. Military Medical Academy, Dental Clinic, Department of Periodontology, Belgrade, Serbia + University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia
2. University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + Military Medical Academy, Dental Clinic, National Poison Control Centre, Belgrade, Serbia
3. University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + Military Medical Academy, Dental Clinic, Department of Implantology, Belgrade, Serbia
4. University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + Military Medical Academy, Dental Clinic, Department of Orthodontics, Belgrade, Serbia
5. University of Kragujevac, Faculty of Medical Sciences, Department of Dentistry, Kragujevac, Serbia