Pulmonary Disease, Chronic Obstructive

• Research Site — Vitoria-Gasteiz, Alava, Spain
• Research Site — Elda, Alicante, Spain
• Research Site — Petrel, Alicante, Spain
• Research Site — Almería, Almeria, Spain

• Research Site — Gothenburg, Sweden
• Research Site — Luleå, Sweden
• Research Site — Lund, Sweden

• Fondazione Maugeri IRCCS — Lumezzane, Brescia, Italy
• Villa Pineta Hospital — Pavullo nel Frignano, Modena, Italy
• Fondazione Maugeri IRCCS — Veruno, Novara, Italy
• Centro Riabilitazione Auxilium Vitae — Volterra, Pisa, Italy

• Villa Pineta Hospital — Pavullo nel Frignano, Modena, Italy

Not specified

• Research Site — Adana, Turkey (Türkiye)
• Research Site — Ankara, Turkey (Türkiye)
• Research Site — Antalya, Turkey (Türkiye)
• Research Site — Aydin, Turkey (Türkiye)

• Firestone Institute for Respiratory Health, St. Joseph's Healthcare — Hamilton, Ontario, Canada

• Oslo University Hospital Ullevaal, Department of Pulmonary Medicine — Oslo, Norway

• University Center for Chronic Diseases Dekkerswald — Groesbeek, Netherlands
• Primary care, general practitioners — Nijmegen, Netherlands

• Novartis Investigator Site — Anaheim, California, United States
• Novartis Investigator Site — Los Angeles, California, United States
• Novartis Investigator Site — Panama City, Florida, United States
• Novartis Investigator Site — Marietta, Georgia, United States