1. Clinical Center of Vojvodina, Center for Pathology and Histology, Novi Sad
2. Clinical Center of Vojvodina, Center for Pathology and Histology, Novi Sad + University of Novi Sad, Faculty of Medicine, Department of Pathology, Novi Sad
3. University of Novi Sad, Faculty of Medicine, Department of Surgery, Novi Sad
4. University of Novi Sad, Faculty of Medicine, Department of Surgery, Novi Sad + Clinical Center of Vojvodina, Clinic of Abdominal, Endocrine and Transplantation Surgery, Novi Sad