Pulmonary Disease, Chronic Obstructive

• Pinnacle Research Group, LLC — Anniston, Alabama, United States
• Arizona Pulmonary Specialists, Ltd. — Phoenix, Arizona, United States
• University of California-Davis Medical Group — Sacramento, California, United States
• University Clinical Research-DeLand, LLC — DeLand, Florida, United States

• Department of Infectious Diseases, Skejby Hospital — Aarhus N, Denmark
• Departement of Medicin, Silkeborg Hospital — Silkeborg, Denmark

• St. Joseph's Healthcare — Hamilton, Ontario, Canada

• Prince of Wales Hospital — Hong Kong

• Hospital Universitario Son Dureta — Palma de Mallorca, Balearic Islands, Spain

Not specified

Not specified

• Respiratory Therapy Intensive Care Unit, Taipei Veterans General Hospital — Taipei, Taiwan

• Research Site — Phoenix, Arizona, United States
• Research Site — Los Angeles, California, United States
• Research Site — Sepulveda, California, United States
• Research Site — Walnut Creek, California, United States

• Brigham and Women's Hospital — Boston, Massachusetts, United States
• Caritas St Elizabeth's Medical Center — Boston, Massachusetts, United States