[1] Varazdin Gen Hosp, Dept Internal Med, Varazhdin, Croatia
[2] Zagreb Univ, Dept Nephrol Arterial Hypertens Dialysis & Transpl, Hosp Ctr, Kispaticeva 12, HR-10000 Zagreb, Croatia
[3] Univ Zagreb, Sch Med, Zagreb, Croatia
[4] Josip Juraj Strossmayer Univ Osijek, Sch Med, Osijek, Croatia