Pulmonary Disease, Chronic Obstructive

• Brussels, Belgium

• Ventura County Medical Center — Santa Ana, California, United States

• UCSF Helen Diller Medical Center at Parnassus Heights ( Site 0110) — San Francisco, California, United States
• University of Colorado Anschutz Medical Campus-University of Colorado Hospital Cardiac and Vascular ( Site 0101) — Aurora, Colorado, United States
• Clinovation Intl. Corp. ( Site 0108) — Sebring, Florida, United States
• Alexian Brothers Medical Center-Pulmonary ( Site 0109) — Elk Grove Village, Illinois, United States

• Shanghai Qigong Research Institute — Shanghai, Shanghai Municipality, China
• Changzheng Community Health Service Center of Putuo District, Shanghai — Shanghai, Shanghai Municipality, China

Not specified

• Pneumology Department - Hôpital Cochin — Paris, France

• Medical University Hospital — Bialystok, Poland

• Shanghai Ninth People's Hospital Affiliated to Shanghai Jiaotong University — Shanghai, Shanghai Municipality, China

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• Northwestern Memorial Hospital — Chicago, Illinois, United States
• University of Iowa — Iowa City, Iowa, United States
• Johns Hopkins University — Baltimore, Maryland, United States

• West China Hospital of Sichuan University — Chengdu, Sichuan, China