Bronchitis, Chronic

• Copd01 50001 — Boerne, Texas, United States
• Copd01 50003 — Columbus, Ohio, United States
• Copd01 50002 — DuBois, Pennsylvania, United States
• Copd01 20001 — Beijing, China

• Brigham and Women's Hospital — Boston, Massachusetts, United States

• University of Pittsburgh Emphysema/COPD Research Center — Pittsburgh, Pennsylvania, United States

• Rush University Medical Center — Chicago, Illinois, United States

• Anhui Chest Hospital — Hefei, Anui, China
• Affiliated Beijing Chaoyang Hospital of Capital Medical University — Beijing, Beijing Municipality, China
• Hospital Emergency General — Beijing, Beijing Municipality, China
• The First People's Hospital of Changzhou — Changzhou, Jiangsu, China

• Science 37 — Los Angeles, California, United States
• Stamford Hospital — Stamford, Connecticut, United States
• Hillcrest Medical Research — DeLand, Florida, United States
• Universal Axon Clinical Research — Doral, Florida, United States

• Insituto Nacional de Enfermedades Respiratorias "Ismael Cosío Villegas" — Mexico City, Tlalpan, Mexico

• COPD Foundation — Washington D.C., District of Columbia, United States

• University of Alabama at Birmingham — Birmingham, Alabama, United States
• NewportNativeMD, Inc. — Newport Beach, California, United States
• Institute of HealthCare Assessment d/b/a Apex Clinical Research — San Diego, California, United States
• National Jewish Health Medical Center — Denver, Colorado, United States

Not specified