1. Centre for Health Economics, University of York, York, UK
2. Department of Cardiology, S. Matteo Hospital, Pavia, Italy
3. Department of Cardiology, Second University of Naples, S. Matteo Hospital, Monaldi Hospital, Naples, Italy
4. Department of Clinical and Biological Sciences, Interstitial and Rare Lung Disease Unit, University of Turin, Orbassano, Turin, Italy
5. Department of Clinical and Biological Science, University of Turin, Hospital Internal Medicine I, Orbassano, Turin, Italy
6. Cardiothoracic-Vascular and Transplant Department, A.O.U. Policlinico, Vittorio Emanuele, Catania, Italy
7. Pulmonology Unit, Department for the Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation, IRCCS – ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), Palermo, Italy
8. Medical Department, GlaxoSmithKline SpA, Verona, Italy
9. Access to Medicine Department, GlaxoSmithKline SpA, Verona, Italy
10. Pulmonary Hypertension Unit, Department of Cardiovascular and Respiratory Disease, Sapienza University of Rome, Rome, Italy