1. Clinical Hospital Center Zemun, Clinic for Internal Medicine, Department of Nephrology, Belgrade, Serbia
2. University of Belgrade, Faculty of Medicine, Institute of Pathology, Belgrade, Serbia
3. Clinical Center of Serbia, Clinic for Nephrology, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia
4. Clinical Center of Vojvodina, Clinic of Nephrology and Clinical Immunology, Novi Sad, Serbia + University of Novi Sad, Faculty of Medicine, Novi Sad, Serbia
5. Clinical Center of Vojvodina, Clinic of Nephrology and Clinical Immunology, Novi Sad, Serbia
6. Medigroup Hospital, Belgrade, Serbia + University of Banja Luka, Faculty of Medicine, Banja Luka, Bosnia and Herzegovina