Lung Diseases, Obstructive

• Irmandade Santa Casa de Misericordia de Porto Alegre — Porto Alegre, Rio Grande do Sul, Brazil
• St. Joseph's Healthcare — Hamilton, Ontario, Canada
• Hopital Laval, Laval University — Sainte-Foy, Quebec, Canada
• Gartnavel General Hospital, Univ. Glasgow — Glasgow, Scotland, United Kingdom

• University of Southampton — Southampton, United Kingdom

• Cincinnati Children's Medical Hospital — Cincinnati, Ohio, United States

Not specified

• Research Site — Llanelli, United Kingdom
• Research Site — Merthyr Tydfil, United Kingdom

Not specified

• Research Site — San Salvador, Argentina

• Research Site — Erpent, Belgium
• Research Site — Eindhoven, Netherlands
• Research Site — Groningen, Netherlands
• Research Site — Zutphen, Netherlands

• Minia University Hospital — Multiple Locations, Minya Governorate, Egypt

• Guangzhou Institute of Respiratory Health,The First Affiliated Hospital of Guangzhou Medical University — Guangzhou, Guangdong, China