1 Division of Nephrology and Kidney Research Institute, Department of Medicine, University of Washington, Seattle, Washington.
2 Nephrology, Amsterdam University Medical Center, Amsterdam, The Netherlands; Amsterdam Cardiovascular Sciences, Diabetes & Metabolism, Amsterdam UMC, Amsterdam, The Netherlands.
3 Division of Nephrology and Kidney Research Institute, Department of Medicine, University of Washington, Seattle, Washington. Electronic address: deboer@u.washington.edu.