1. Bežanijska Kosa University Hospital Medical Center, Department for HPB Surgery, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Department for Surgery with Anesthesiology, Belgrade, Serbia
2. Bežanijska Kosa University Hospital Medical Center, Department for HPB Surgery, Belgrade, Serbia
3. University Clinical Center of Serbia, Clinic for Endocrine Surgery, Belgrade, Serbia
4. University of Belgrade, Faculty of Medicine, Department for Surgery with Anesthesiology, Belgrade, Serbia + Bežanijska Kosa University Hospital Medical Center, Department for Hematology, Belgrade, Serbia
5. University of Belgrade, Faculty of Medicine, Department for Surgery with Anesthesiology, Belgrade, Serbia + Bežanijska Kosa University Hospital Medical Center, Department for Oncology Surgery, Belgrade, Serbia