1. National Heart and Lung Institute, Imperial College London, London, United Kingdom;
2. Department of Medicine, University of Cambridge, Cambridge, United Kingdom;
3. Université Paris–Saclay, AP-HP, INSERM UMR_S 999, Department of Respiratory and Intensive Care Medicine, Pulmonary Hypertension National Referral Centre, Hôpital de Bicêtre, Le Kremlin Bicêtre, France;
4. Department of Cardiology, Royal Free Campus, University College London, London, United Kingdom;
5. University of Newcastle upon Tyne, Newcastle upon Tyne, United Kingdom;
6. University of Glasgow, Glasgow, Scotland, United Kingdom;
7. Pulmonary Vascular Disease Unit, Royal Papworth Hospital, Cambridge, United Kingdom;
8. Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom;
9. Sheffield Pulmonary Vascular Unit, Royal Hallamshire Hospital, Sheffield, United Kingdom; and
10. BioResource for Translational Research, National Institute for Health Research Cambridge Biomedical Campus, Cambridge, United Kingdom