Department of Medicine, University of Illinois, Chicago, Illinois. Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana. Center for Translational Metabolism and Health, Institute for Public Health and Medicine, Division of Nephrology and Hypertension, Feinberg School of Medicine, Northwestern University, Chicago, Illinois. Nephrology Section, Boston University Medical Center, Boston, Massachusetts. Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland. Division of Nephrology, Department of Medicine, University of Maryland, Baltimore, Maryland. Department of Nephrology and Hypertension, Cleveland Clinic, Cleveland, Ohio. Division of Nephrology, MetroHealth, Cleveland, Ohio. Department of Medicine, The University of Chicago, Chicago, Illinois. Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania. Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania. Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.