9. To assess which hemodialysis treatment modality will be chosen by the patients at the end of the study. The choice of treatment will be compared as follows: (1) number of patients choosing UCR-treatment against number of patients choosing conventional treatment; (2) number of patients choosing UTR-treatment against number of patients choosing conventional treatment; (3) number of patients choosing UCR-treatment against number of patients choosing UTR-treatment. The statistical test for analyses (1), (2) and (3) will be the two-sided chi square test, for each analysis.