 Each patients will get questionnaires for: Quality of life using Kidney Disease Quality of Life - Short form 36 KDQOL-Short form 36 and EuroQoL-3D EQ-3D, beliefs about medicine, Hospital Anxiety and Depression Scale HADS, Morisky medication adherence scale and visual adherence scale VAS, sleeping related questionnaires Epworth, Berlin, Pittsburgh. A Mini Mental Status MMS test will be done regarding cognitive function. 