1. Military Medical Academy, Clinic for Stomatology, Belgrade, Serbia + University of Defence in Belgrade, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia
2. University of Defence in Belgrade, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia
3. Military Medical Academy, Institute for Medical Research, Belgrade, Serbia
4. University of Defence in Belgrade, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + Military Medical Academy, Institute for Pathology, Belgrade, Serbia
5. University of Defence in Belgrade, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + Military Medical Academy, Institute for Medical Research, Belgrade, Serbia
6. University of Defence in Belgrade, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + University of East Sarajevo, Faculty of Medicine, Republic of Srpska, Foča, Bosnia and Herzegovina