1. Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, 11000 Belgrade, Serbia
2. Faculty of Medicine, University of Montenegro, 81000 Podgorica, Montenegro
3. Center for Laboratory Diagnostics, Primary Health Care Center, 81000 Podgorica, Montenegro
4. Department of Clinical Biochemistry, Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
5. Department of Cardiology, Clinical Hospital Center Zemun, 11070 Belgrade, Serbia
6. Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
7. Department of Cardiology, Clinical Hospital Center Bezanijska Kosa, 11070 Belgrade, Serbia