Pulmonary Disease, Chronic Obstructive

• Pfizer Investigational Site — Phoenix, Arizona, United States
• Pfizer Investigational Site — Riverside, California, United States
• Pfizer Investigational Site — Clearwater, Florida, United States
• Pfizer Investigational Site — Clearwater, Florida, United States

• GSK Investigational Site — Bruchsal, Baden-Wurttemberg, Germany
• GSK Investigational Site — Heidelberg, Baden-Wurttemberg, Germany
• GSK Investigational Site — Mannheim, Baden-Wurttemberg, Germany
• GSK Investigational Site — Wiesloch, Baden-Wurttemberg, Germany

• GSK Investigational Site — Adamsville, Alabama, United States
• GSK Investigational Site — Foothill Ranch, California, United States
• GSK Investigational Site — Huntington Beach, California, United States
• GSK Investigational Site — Los Gatos, California, United States

• Montgomery, Alabama, United States
• Anaheim, California, United States
• Encinitas, California, United States
• Fullerton, California, United States

• Department of Pulmonary Medicine, Medical University of Vienna — Vienna, Austria

• West Park Healthcare Centre — Toronto, Ontario, Canada

Not specified

• Shanghai Tenth People's Hospital — Shanghai, Shanghai Municipality, China

• Huddinge University Hospital — Huddinge, Sweden
• Umeå University Hospital — Umeå, Sweden

• GSK Investigational Site — Aalborg, Denmark
• GSK Investigational Site — København NV, Denmark
• GSK Investigational Site — Helsinki, Finland
• GSK Investigational Site — Gauting, Bavaria, Germany