1. Heart and Lung Research Institute,
2. Royal Papworth Hospital, and
3. Medical Research Council Biostatistics Unit,
4. Cambridge Biomedical Research Centre Phenotyping Hub, Department of Medicine, University of Cambridge,
5. Royal Free London National Health Service Foundation Trust, London, United Kingdom;
6. Freeman Hospital, Newcastle-upon-Tyne, United Kingdom;
7. Hammersmith Hospital, London, United Kingdom;
8. Scottish Pulmonary Vascular Unit, Golden Jubilee National Hospital, Glasgow, United Kingdom;
9. Sheffield Pulmonary Vascular Disease Unit, Royal Hallamshire Hospital, Sheffield, United Kingdom;
10. Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom;
11. Royal United Hospitals Bath National Health Service Foundation Trust, Bath, United Kingdom;
12. National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London, United Kingdom;
13. Royal Brompton Hospital, London, United Kingdom;
14. Istituto di Ricerca Genetica e Biomedica, Consiglio Nazionale delle Ricerche, Cagliari, Italy;
15. University of Sassari, Sassari, Italy; and
16. Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, Cambridge Biomedical Campus, Cambridge, United Kingdom;
17. Department of Medicine, University of Cambridge, Addenbrookes Hospital, Hills Road, Cambridge, United Kingdom