1. Department of MedicinePennsylvania HospitalUniversity of Pennsylvania Health SystemPhiladelphiaPAUSA
2. Department of CardiologyPennsylvania HospitalUniversity of Pennsylvania Health SystemPhiladelphiaPAUSA
3. Pulmonary, Allergy, and Critical Care DivisionDepartment of MedicinePenn Presbyterian Medical CenterPhiladelphiaPAUSA
4. Perelman School of Medicine, University of PennsylvaniaPhiladelphiaPAUSA