1Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts

2Division of Cardiovascular and Clinical Epidemiology, Johns Hopkins University, Baltimore, Maryland

3Division of Nephrology, Department of Medicine, Johns Hopkins University, Baltimore, Maryland

4Kidney Health Research Collaborative, Department of Medicine, San Francisco VA Health Care System and University of California, San Francisco, California

5Division of Nephrology, Tufts Medical Center, Boston, Massachusetts

6Heart Failure and Biomarker Center, Baim Institute for Clinical Research, Boston, Massachusetts

Correspondence: Prof. James L. Januzzi Jr., Massachusetts General Hospital, Cardiology Division, 55 Fruit Street, Boston, MA 02114. Email: [email protected]