Lung Diseases, Obstructive

• The Osteoporosis Centre of BC (Bone Consultaton and Bone Mineral Density) — Vancouver, British Columbia, Canada
• The Lung Centre, Vancouver Coastal Health, 7th Floor 2775 Laurel Street — Vancouver, British Columbia, Canada
• The Pacific Lung Centre, Providence Health Care — Vancouver, British Columbia, Canada

• Harefield Hospital — Harefield, United Kingdom

• Research Site — Birmingham, Alabama, United States
• Research Site — Phoenix, Arizona, United States
• Research Site — Arcadia, California, United States
• Research Site — Los Angeles, California, United States

• Research Site — Los Angeles, California, United States
• Research Site — Centennial, Colorado, United States
• Research Site — Denver, Colorado, United States
• Research Site — Hialeah, Florida, United States

• Research Site — Fountain Valley, California, United States
• Research Site — Walnut Creek, California, United States
• Research Site — Celebration, Florida, United States
• Research Site — Ocala, Florida, United States

• UPMC Fallk Clinic — Pittsburgh, Pennsylvania, United States
• Children's Hospital of Pittsburgh of UPMC — Pittsburgh, Pennsylvania, United States

• University of Rochester Medical Center — Rochester, New York, United States

Not specified

• laboratory of Functional Respiratory Assessment — São Paulo, Brazil

• Westpark Health Care Centre — Toronto, Ontario, Canada