Evaluation of different glycemic variations between the dialysis period and non-dialysis period in two groups: nondiabetic and diabetic patients undergone two different hemodialysis methods. Thirty-six patients, males and females, aged 50-80 years, with end stage renal disease (ESRD) will undergo hemodialysis and continuous glucose monitoring (CGM). The investigators will evaluate also inflammation markers before and after the different hemodialysis methods.