1. Bežanijska Kosa University Hospital Medical Center, Department for Hepato-Pancreato-Biliary Surgery, Belgrade, Serbia
2. Bežanijska Kosa University Hospital Medical Center, Department for Hepato-Pancreato-Biliary Surgery, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Department for Surgery with Anesthesiology, Belgrade, Serbia
3. New Hospital General Hospital, Department for Surgery, Novi Sad, Serbia