1. University of Manchester, Manchester University National Health Service Foundation Trust, Manchester, United Kingdom;
2. Respiratory Institute, Hospital Clinic, University of Barcelona, Institut d’investigacions biomediques August Pi I Sunyer, Centro de Investigación Biomédica en Red Enfermedades Respiratorias, Barcelona, Spain;
3. Weill Cornell Medicine, New York-Presbyterian Hospital, New York, New York;
4. Respiratory Medicine Unit, University of Ferrara, University Hospital S. Anna, Ferrara, Italy;
5. Oxford Respiratory National Institute of Health Research Biomedical Research Centre and Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom;
6. National Heart and Lung Institute, Imperial College London, London, United Kingdom;
7. Department of Medicine, Pulmonary and Critical Care Medicine, University of Marburg, Member of the German Center for Lung Research (DZL), Marburg, Germany; and
8. University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, United Kingdom