1. Medical Faculty, University of Nis, Blvd. Dr Zoran Djindjic 81, 18000 Nis, Serbia
2. Clinic of Endocrinology, Diabetes and Metabolic Disorders, University Clinical Center Nis, Blvd. Dr Zoran Djindjic 48, 18000 Nis, Serbia
3. Surgery Clinic, University Clinical Center Nis, Blvd. Dr Zoran Djindjic 48, 18000 Nis, Serbia
4. Psychiatry Clinic, University Clinical Center Nis, Blvd. Dr Zoran Djindjic 48, 18000 Nis, Serbia
5. Center for Medical Biochemistry, University Clinical Center, Blvd. Dr Zoran Djindjic 48, 18000 Nis, Serbia