1 Heart Failure and Arrhythmias Branch, Adult and Pediatric Cardiac Research Program, Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland.
2 Heart Failure and Arrhythmias Branch, Adult and Pediatric Cardiac Research Program, Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland. Electronic address: lathropd@nhlbi.nih.gov.