1. Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan
2. Respiratory Institute, Hospital Clinic, University of Barcelona, August Pi i Sunyer Biomedical Research Institute, Biomedical Research Networking Center on Respiratory Diseases, Madrid, Spain
3. Department of Medicine, Pulmonary, Brigham and Women’s Hospital, Boston, Massachusetts
4. Department of Thoracic Medicine and Surgery, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania
5. College of Medicine and Health, University of Exeter Medical School, University of Exeter, Exeter, United Kingdom
6. Respiratory Medicine, Cochin Hospital, APHP.Centre-University of Paris, Cochin Institute (UMR1016), Paris, France
7. Respiratory Division, Department of Translational Medicine, School of Medicine, University of Ferrara, Ferrera, Italy
8. Lung Investigation Unit, Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham National Health Service Foundation Trust, Birmingham, United Kingdom
9. Airway Disease Section, National Heart and Lung Institute, Imperial College, London, United Kingdom; and
10. Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Center Giessen and Marburg, member of the German Center for Lung Research (DZL), Philipps-University, Marburg, Germany