1. Papworth Trials Unit CollaborationPapworth HospitalCambridgeUK
2. Pulmonary Vascular Disease UnitPapworth HospitalCambridgeUK
3. Golden Jubilee HospitalGlasgowUK
4. Mater MisericordiaDublinIreland
5. Roche PharmaceuticalsWelwyn Garden CityUK
6. University of CambridgeCambridgeUK
7. University of NewcastleNewcastleUK