Lung Diseases, Obstructive

• Pediatric Department University of Verona — Verona, Italy

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• University of California at San Diego — San Diego, California, United States
• National Jewish Hospital — Denver, Colorado, United States
• Nemour's Childrens Center — Jacksonville, Florida, United States

• University Hospital Larisa — Larissa, Thessaly, Greece

Not specified

• Pfizer Investigational Site — Singapore

• Department of Pediatrics and Allergy, Medical University of Lodz — Lodz, Poland

• University Medical Center Hamburg-Eppendorf — Hamburg, Germany

• Soonchunhyang University Bucheon Hospital — Bucheon-si, South Korea
• Inje university Pusan Paik hospital — Busan, South Korea
• Chonbuk national university hospital — Chunbuk, South Korea
• Keimyung university dongsan medical center — Daegu, South Korea

• Medical University of Vienna — Vienna, Austria

• Philippine General Hospital — Manila, Philippines