1. Clinic of Pulmonology, University Hospital Zurich Zurich Switzerland
2. Center of Pulmonology, CHUV Lausanne Switzerland
3. Center of Pulmonology, Cantonal Hospital Lucerne Lucerne Switzerland
4. Center of Pulmonology, Hôpital neuchâtelois Pourtalès Neuenburg Switzerland
5. Interdisciplinary Center for Pulmonary Hypertension, Bern University Hospital and University of Bern Bern Switzerland
6. Pulmonary Hypertension Program, University Hospital of Geneva Geneva Switzerland
7. Lung Center, Cantonal Hospital St. Gallen St. Gallen Switzerland
8. Department of Thoracic Surgery University Hospital Zurich Zurich Switzerland
9. Department of Angiology Ospedale La Carità Locarno Switzerland
10. Center of Pulmonology, University Hospital Basel Basel Switzerland