COPD

• University Medical Center Hamburg-Eppendorf — Hamburg, Germany

• Department of Pulmonology, Albert Szent-Györgyi Clinical Center, University of Szeged — Deszk, Hungary

• Department of Pulmonology, Aristotle University of Thessaloniki — Thessaloniki, Greece
• Respiratory Failure Unit, General Hospital "G. Papanikolaou" — Thessaloniki, Greece

• Hôpital Laval — Québec, Quebec, Canada

• Henry Ford Hospital Emergency Department — Detroit, Michigan, United States

• University of Washington — Seattle, Washington, United States

• Beth Israel Deaconess Medical Center — Boston, Massachusetts, United States

• Catharina Hospital Eindhoven — Eindhoven, North Brabant, Netherlands

Not specified

• St George's Healthcare NHS Trust — London, United Kingdom