1. Clinic for Nephrology, University Clinical Center of Serbia, Pasterova 2, 11000 Belgrade, Serbia
2. Faculty of Medicine, University of Belgrade, Doktora Subotica Starijeg 8, 11000 Belgrade, Serbia
3. Clinic for Cardiology, University Clinical Center of Serbia, Pasterova 2, 11000 Belgrade, Serbia
4. Center for Medical Biochemistry, University Clinical Center of Serbia, Pasterova 2, 11000 Belgrade, Serbia
5. Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovica 69, 34000 Kragujevac, Serbia