1. Department of Pathophysiology Faculty of Medicine University of Nis Nis Serbia
2. Clinic of Cardiology University Clinical Center of Nis Nis Serbia
3. Department of Biochemistry Faculty of Medicine University of Nis Nis Serbia
4. Medical Biochemistry Center University Clinical Center of Nis Nis Serbia
5. Clinic of Neurology University Clinical Center of Nis Nis Serbia
6. Clinic of Thoracic Surgery University Clinical Center of Nis Nis Serbia