1. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + University Clinical Center of Serbia, Clinic for Emergency Surgery, Belgrade, Serbia
2. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + University Clinical Center of Serbia, Center for Radiology and Magnetic Resonance Imaging, Belgrade, Serbia
3. University Clinical Center of Serbia, Clinic for Emergency Surgery, Belgrade, Serbia
4. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + University Clinical Center of Serbia, Clinic for Gastroenterology, Belgrade, Serbia
5. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + University Clinical Center of Serbia, Clinic for Psychiatry, Belgrade, Serbia
6. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + University Clinical Center of Serbia, Clinic for Gynecology and Obstetrics, Belgrade, Serbia