1. National Pulmonary Hypertension Unit, Mater Misericordiae University Hospital Dublin Ireland
2. Pulmonary Hypertension Unit, Cardiology Department CIBERCV, Hospital 12 de Octubre Madrid Spain
3. Actelion Pharmaceuticals Ltd, a Johnson & Johnson Company, Global Epidemiology Allschwil Switzerland
4. Actelion Pharmaceuticals Ltd, a Johnson & Johnson Company, Global Medical Affairs Allschwil Switzerland
5. Janssen‐Cilag S.p.A, a Johnson & Johnson Company, Statistics and Decision Sciences Milan Italy
6. Actelion Pharmaceuticals Ltd, a Johnson & Johnson Company, Global Medical Safety Allschwil Switzerland
7. Department of Public Health and Clinical Medicine, Cardiology and Heart Centre Umeå University Umeå Sweden
8. Department of Pulmonology Kreisklinik Bad Reichenhall Bad Reichenhall Germany
9. Department Internal Medicine II, Faculty of Medicine Regensburg University Regensburg Germany