**Author details**

Ivica Maleta, Božidar Vujičić\* and Sanjin Rački *Department of Nephrology and Dialysis, University Hospital Rijeka, Rijeka, Croatia* 

Iva Mesaroš Devčić *Polyclinic for Hemodialysis ¨'Fresenius Medical Care¨', Delnice, Croatia* 
