1. Department of Nephrology, Arterial Hypertension, Dialysis and Transplantation, University Hospital Centre Zagreb, 10000 Zagreb, Croatia
2. School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
3. Department of Nephrology, General Hospital Varazdin, 42000 Varaždin, Croatia
4. Department of Nephrology, Clinical Center Montenegro, 81000 Podgorica, Montenegro