Department of Internal Medicine, Division of Nephrology and. Department of Nephrology and Institute for Cardiovascular Research, Vrije University Medical Centre, Amsterdam, The Netherlands. Department of Internal Medicine, Division of Nephrology, Zorggroep Twente Hospital, Almelo, The Netherlands. Department of Internal Medicine, Division of Nephrology, Medical Centre Leeuwarden, Leeuwarden, The Netherlands; and. Department of Internal Medicine, Division of Nephrology, Martini Hospital Groningen, Groningen, The Netherlands. Department of Clinical Pharmacy and Pharmacology, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands. Department of Internal Medicine, Division of Nephrology and m.h.de.borst@umcg.nl.