Data management {19}
Randomisation and data collection will be performed using an eCRF within REDCap, a secure web application. Randomisation, data collection and entry in the eCRF are performed both by dedicated research nurses and by the investigators. Data quality is promoted in the eCRF, e.g. by range checks. Paper forms are used for patient questionnaires and dialysis protocols and will be scanned into the eCRF by dedicated research nurses and later transferred to the main database.