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

2Janssen Research & Development, LLC, Spring House, Pennsylvania

3BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, United Kingdom

4Kolling Institute, Royal North Shore Hospital University of Sydney, Sydney, New South Wales, Australia

5Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi

6Baylor Scott & White Institute, Dallas, Texas

7The George Institute for Global Health, UNSW Sydney, Sydney, New South Wales, Australia

8NHMRC Clinical Trials Centre, University of Sydney, Sydney, New South Wales, Australia

9Concord Repatriation General Hospital, Sydney, New South Wales, Australia

10Roche Diagnostics International, Rotkreuz, Switzerland

11Department Clinical Pharmacy and Pharmacology, University of Groningen, Groningen, The Netherlands

12Heart Failure and Biomarker Trials, Baim Institute for Clinical Research, Boston, Massachusetts

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