1. Advanced Heart Failure/Transplantation Programme, Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, US
2. Department of Medicine, Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, US
3. Advanced Heart Failure/Transplantation Programme, Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, US; Pulmonary Hypertension Programme, Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, US