1. Department of MedicineCardiovascular DivisionPulmonary Hypertension, Right Heart Failure and CTEPH ProgramTemple University School of MedicinePhiladelphiaPAUSA
2. Department of MedicineCardiovascular DivisionUniversity of MichiganAnn ArborMIUSA
3. Department of MedicineCardiovascular DivisionHeart Failure and Pulmonary Hypertension ProgramHospital of the University of PennsylvaniaPhiladelphiaPAUSA
4. Department of MedicineCardiovascular DivisionUniversity of WisconsinMadisonWIUSA