Amsterdam Diabetes Center, Department of Internal Medicine, Academic Medical Center, VU University Medical Center, Amsterdam, The Netherlands. Department of Pediatrics, Division of Endocrinology, University of Colorado School of Medicine, Aurora, Colorado, USA. Department of Medicine, Division of Nephrology, University of Colorado School of Medicine, Aurora, Colorado, USA. Department of Medicine and Department of Physiology, Division of Nephrology, University Health Network, University of Toronto, Toronto, Ontario, Canada. Department of Nephrology and Hypertension, University Medical Center, Utrecht, The Netherlands. Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.