1. Department for Cardiac Surgery, Military Medical Academy , Belgrade, Serbia
2. Clinic for Cardiac Surgery, UC Clinical Centre , Belgrade, Serbia
3. Department of Surgery with Anesthesiology, Faculty of Medicine, University of Belgrade , Belgrade, Serbia
4. Faculty of Pharmacy, Department for Medical Biochemistry, University of Belgrade , Belgrade, Serbia
5. Department for Medical Statistics and Informatics , Belgrade, Serbia
6. Department for Hematology and Transfusion Laboratory, Clinic for Gynecology and Obstetrics, UC Clinical Centre , Belgrade, Serbia
7. Laboratory Department, Health Center Rakovica , Belgrade, Serbia