1. University of Marburg, Member of the German Center for Lung Research (DZL), Marburg, Germany
2. Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
3. New York-Presbyterian Hospital, Weill Cornell Medical Center, New York, New York
4. University of Texas Health Science Center, San Antonio, Texas
5. South Texas Veterans Health Care System, San Antonio, Texas
6. National Heart and Lung Institute, Imperial College, London, United Kingdom
7. McGill University Health Centre, McGill University, Montreal, Quebec, Canada
8. Brigham and Women’s Hospital, Boston, Massachusetts
9. State Key Lab for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
10. University of Leuven, Leuven, Belgium
11. University of Modena and Reggio Emilia, Modena, Italy
12. Faculty of Medicine, Flinders University, Bedford Park, South Australia, Australia
13. Royal Devon and Exeter Hospital, Exeter, United Kingdom
14. Universidad de la República, Hospital Maciel, Montevideo, Uruguay
15. Hokkaido University School of Medicine, Sapporo, Japan
16. Hôpital Cochin (Assistance Publique–Hôpitaux de Paris), University Paris Descartes, Paris, France
17. Thorax Institute, Hospital Clinic Universitat de Barcelona, Barcelona, Spain
18. St. Paul’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
19. University of Manchester, Manchester, United Kingdom
20. University Hospital, Birmingham, United Kingdom; and
21. Hospital Clínic, Universitat de Barcelona, Centro de Investigación Biomédica en Red de Enfermedade Respiratorias, Barcelona, Spain