1. Military Medical Academy, Clinic for Anesthesiology and Intensive Therapy, 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, Institute for Medical Research, Belgrade, Serbia
3. Clinical Hospital Center Kosovska Mitrovica, Department of Anesthesiology, Kosovska Mitrovica, Serbia
4. Clinical Center Kragujevac, Kragujevac, Serbia
5. University of Defence, Faculty of Medicine of the Military Medical Academy, Belgrade, Serbia + Military Medical Academy, Clinic for Vascular and Endovascular Surgery, Belgrade, Serbia