1. Advanced Heart FailureCardiac Transplantation and Pulmonary Hypertension ProgramsCardiovascular DivisionDepartment of MedicineUniversity of Pennsylvania Perelman School of MedicinePhiladelphiaPAUSA
2. Pulmonary HypertensionRight Heart Failure and Pulmonary Thromboendarterectomy ProgramTemple University HospitalPhiladelphiaPAUSA
3. Division of Pulmonary and Critical Care MedicineJohns Hopkins University School of MedicineBaltimoreMDUSA
4. Cardiology DivisionLancaster General HospitalLancasterPAUSA