1. Niš University Clinical Center, Clinic of Thoracic surgery, Niš, Serbia
2. Niš University Clinical Center, Center for Medical and Clinical Biochemistry, Niš, Serbia
3. Niš University Clinical Center, Center for Medical and Clinical Biochemistry, Immunology Diagnostics Department, Niš, Serbia
4. University of Niš, Faculty of Medicine, Department of Medical Statistics and Informatics, Niš, Serbia
5. Niš University Clinical Center, Clinic of Endocrine Surgery, Niš, Serbia
6. Niš University Clinical Center, Clinic of Oncology, Department for Radiotherapy, Niš, Serbia
7. Niš University Clinical Center, Clinic of Urology, Niš, Serbia
8. University of Belgrade, Faculty of Medicine, Niko Miljanić Institute of Anatomy, Belgrade, Serbia