1. Department of Medicine, UPMC Heart and Vascular InstituteUniversity of Pittsburgh Pittsburgh Pennsylvania
2. East Carolina Heart InstituteEast Carolina University, Brody School of Medicine Greenville North Carolina
3. Advanced Heart Failure and TransplantSentara Heart Hospital Norfolk Virginia
4. Division of Cardiovascular Medicine, Department of MedicineThe Ohio State University Columbus Ohio
5. Division of Cardiology, Department of MedicineWeill Cornell Medical College New York
6. Baylor Scott & White Heart and Vascular HospitalBaylor University Medical Center Dallas Texas
7. Division of Cardiovascular MedicineVanderbilt University Heart and Vascular Institute Nashville Tennessee
8. Division of Cardiology, Department of MedicineTufts Medical Center Boston Massachusetts
9. The Duke Clinical Research InstituteDuke University Health System Durham North Carolina
10. The Christ Hospital Cincinnati Ohio
11. Division of CardiologyTexas A&M College of Medicine Dallas Texas
12. Division of Cardiology, Department of MedicineUniversity of California Los Angeles Los Angeles California
13. Knight Cardiovascular InstituteOregon Health and Science University Portland Oregon