1 Univ. Barcelona, Hospital Clinic, IDIBAPS and CIBERES, Spain.
2 Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
3 Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA.
4 University of Exeter Medical School College of Medicine and Health, University of Exeter, Exeter, Devon, UK.
5 South Texas Veterans Health Care System, University of Texas Health, San Antonio, Texas, USA.
6 National Heart & Lung Institute, Imperial College London, United Kingdom.
7 McGill University Health Centre, McGill University, Montreal, Canada.
8 University of Michigan, Ann Arbor, Michigan, USA.
9 Weill Cornell Medical Center/ New York-Presbyterian Hospital, New York, New York, USA.
10 Hospital Universitario de Caracas Universidad Central de Venezuela Centro Médico de Caracas, Caracas, Venezuela.
11 Liverpool University Hospitals NHS Foundation Trust, UK / National Heart and Lung Institute, Imperial College, London, UK / School of Clinical Medicine, College of Health Sciences, University of Kwazulu-Natal, South Africa.
12 University of Ferrara, Ferrara, Italy.
13 Respiratory Medicine Unit and Oxford Respiratory NIHR Biomedical Research Centre, Nuffield Department of Medicine, University of Oxford, UK.
14 Pneumologie, Hôpital Cochin AP-HP.Centre, Université Paris, France.
15 Pulmocare Research and Education (PURE) Foundation, Pune, India.
16 St. Paul's Hospital University of British Columbia, Vancouver, Canada.
17 University of Manchester, Manchester, UK.
18 University Hospital, Birmingham, UK.
19 Universidad de la República Hospital Maciel Montevideo, Uruguay; and.
20 Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Center Giessen and Marburg, Philipps-University, German Center for Lung Research (DZL), Marburg, Germany.