1. Pulmonary, Critical Care and Sleep DivisionTufts Medical CenterTufts University School of MedicineBostonMassachusettsUSA
2. Global Market ResearchBayer PharmaBerlinGermany
3. Ipsos HealthcareLondonUnited Kingdom
4. University of Giessen and Marburg Lung Center (UGMLC)member of the German Center of Lung Research (DZL)GiessenGermany
5. National Pulmonary Endarterectomy ServiceDepartment of Cardiothoracic SurgeryPapworth HospitalCambridgeUnited Kingdom
6. Division of Pulmonary and Critical Care MedicineUniversity of CaliforniaSan DiegoLa JollaCaliforniaUSA
7. Allgemeines Krankenhaus der Stadt WienViennaAustria