1. University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
2. Pulmonary Division, Brigham and Women's Hospital, Boston, MA
3. Department of Thoracic Medicine and Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, USA
4. Flinders University College of Medicine and Public Health, Adelaide, SA, Australia
5. Cátedra de Neumología, Facultad de Medicina, Universidad de la República Hospital Maciel, Montevideo, Uruguay
6. Chest Research Foundation, Pune, India
7. Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Centre Giessen and Marburg (Member of the German Center for Lung Research, DZL), Philipps-Universität Marburg, Germany
8. Guangzhou Institute of Respiratory Disease, State Key Lab of Respiratory Disease & National Clinical Research Center for Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
9. Liverpool School of Tropical Medicine, Liverpool, UK
10. Hospital Universitario de Caracas, Universidad Central de Venezuela, Caracas, Venezuela
11. Department of Pulmonology, N I Pirogov Russian State National Research Medical University, Healthcare Ministry of Russia, Moscow, Russia
12. Department of Medicine, Obafemi Awolowo University, Ile-Ife, Nigeria
13. Global Initiative for Chronic Obstructive Lung Disease, Fontana, WI, USA
14. Institut Respiratori, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Centro de Investigación Biomédica en Red Enfermedades Respiratorias Spain, Barcelona, Spain