1 Department of Nephrology and Intensive Care, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
2 Department of Clinical Pharmacology, University Medical Center Göttingen, Göttingen, Germany.
3 Chronix Biomedical GmbH, Göttingen, Germany.
4 Medical Department III, Division of Nephrology, University of Leipzig Medical Center, Leipzig, Germany.