Pulmonary Disease, Chronic Obstructive

• Lyndon B Johnson General Hospital — Houston, Texas, United States
• The University of Texas- Health Science Center at Houston — Houston, Texas, United States

• Forest Investigative Site 1162 — Birmingham, Alabama, United States
• Forest Investigative Site 1493 — Birmingham, Alabama, United States
• Forest Investigative Site 1620 — Birmingham, Alabama, United States
• Forest Investigative Site 1127 — Mobile, Alabama, United States

Not specified

• AssiutU — Asyut, Egypt

• Universitätsklinikum, Diagnostische und Interventionelle Radiologie und Neuroradiologie — Essen, Germany
• Universitätsklinikum Gießen und Marburg GmbH,Klinik für Diagnostische und Interventionelle Radiologie — Giessen, Germany
• Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie u. Neuroradiologie — Greifswald, Germany
• LungenClinic Grosshansdorf, Pneumologisches Forschungsinstitut — Großhansdorf, Germany

• Birmingham VA Medical Center — Birmingham, Alabama, United States
• University of Alabama — Birmingham, Alabama, United States
• City of Hope National Medical Center — Duarte, California, United States
• Loma Linda VA Medical Center — Loma Linda, California, United States

• GSK Investigational Site — Baltimore, Maryland, United States

• Hospital Italiano de Buenos Aires — Buenos Aires, Argentina

• GSK Investigational Site — Cambridge, United Kingdom

• Hospital Italiano de Buenos Aires — Buenos Aires, Argentina