1. University Clinical Center of Republic of Srpska, Clinic for General and Abdominal Surgery, Banja Luka, Bosnia and Herzegovina
2. Ambulance of Brigade of Guards, Belgrade
3. Faculty of Medical Sciences, Department of Anatomy and Forensic Medicine, Kragujevac + University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade
4. Military Medical Academy, Clinic for Orthopedic Surgery, Belgrade
5. Clinical Center of Kragujevac, Department of Orthopedics and Traumatology, Kragujevac
6. Faculty of Medical Sciences, Kragujevac + Clinical Center of Kragujevac, Kragujevac