Chronic Obstructive Pulmonary Disease

• University Hospital Antwerp — Edegem (Antwerp), Antwerp, Belgium

• University of North Carolina Hospitals Ambulatory Care Center — Chapel Hill, North Carolina, United States

Not specified

• General Practice Research Database — London, United Kingdom

• Centre de recherche de l'IUCPQ — Québec, Quebec, Canada

• Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht — Utrecht, Netherlands

• Service de Pneumologie et Allergologie- Hôpital le Cluzeau. 23 av. D. Larrey — Limoges, France

• Research Site — London, UK, United Kingdom

• Pulmonary Associates — Glendale, Arizona, United States
• Greater Los Angeles Healthcare System — Los Angeles, California, United States
• Bay Pines VA Heatlhcare System — Bay Pines, Florida, United States
• Florida Pulmonary Research Institute, LLC — Winter Park, Florida, United States

• Hélène Perrault — Montreal, Quebec, Canada
• François Maltais — Québec, Quebec, Canada