1 Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
2 Division of Cardiovascular and Clinical Epidemiology, Johns Hopkins University, Baltimore, Maryland.
3 Division of Nephrology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland.
4 Kidney Health Research Collaborative, Department of Medicine, San Francisco VA Health Care System and University of California, San Francisco, California.
5 Division of Nephrology, Tufts Medical Center, Boston, Massachusetts.
6 Heart Failure and Biomarker Center, Baim Institute for Clinical Research, Boston, Massachusetts.