1. Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
2. Oxford University Medical School, Oxford, United Kingdom
3. Respiratory Effectiveness Group, Cambridge, United Kingdom
4. Centre of Academic Primary Care, University of Aberdeen, Aberdeen, United Kingdom
5. Observational and Pragmatic Research Institute, Singapore
6. Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa
7. Section of Respiratory Medicine and Allergology, Department of Clinical Sciences, and
8. Department of General Practice and Elderly Care Medicine, Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
9. Department of Respiratory Medicine, Laboratory for Translational Research in Obstructive Pulmonary Diseases, Ghent University Hospital, Ghent, Belgium
10. Department of Respiratory Medicine, Royal College of Surgeons, Dublin, Ireland
11. CIUSSS de l’Ouest-de-l’Île-de-Montréal, Montreal Chest Institute, Meakins-Christie Laboratories, Oscillometry Unit and Centre for Innovative Medicine, McGill University Health Centre and Centre Research Institute, Montreal, Quebec, Canada
12. Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, Groningen, the Netherlands
13. Respiratory Medicine, Croix-Rousse University Hospital, Lyon, France
14. Department of Respiratory Medicine, Mater Dei Hospital, Msida, Malta
15. Family Physician Airways Group of Canada, University of Toronto, Toronto, Ontario, Canada
16. General Practitioners Research Institute, Groningen, the Netherlands
17. Pneumology Department, University Hospital Vall d'Hebron/Vall d’Hebron Research Institute (VHIR), CIBER de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
18. Department of Respiratory Medicine, Allergy and Clinical Immunology, Nagoya City University, Nagoya, Japan
19. Universidade Federal de Santa Catarina, Florianópolis, Brazil
20. Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
21. Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid, Spain
22. Department of Medicine, Pulmonary and Critical Medicine, German Center for Lung Research, University of Marburg, Marburg, Germany
23. Primary Care Chronic Respiratory Diseases Research Unit, Instituto de Investigación Sanitaria de las Islas Baleres, IdISBa, Palma, Spain
24. Optimum Patient Care, Cambridge, United Kingdom
25. Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada; and
26. Pneumologie et Soins Intensifs Respiratoires, Groupe Hospitalier Cochin, Assistance Publique-Hôpitaux de Paris, Université Paris Descartes, Paris, France