NCT03532893
- Conditions
- COPD, Chronic Disease, Disease Attributes, +7 more
- Locations
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- Peking University First Hospital Beijing, Beijing Municipality, China
- The First Hospital of Qinhuangdao Qinhuangdao, Hebei, China
- The Second Hospital of Hebei Medical University Shijiazhuang, Hebei, China
- Henan Provincial People's Hospital Zhengzhou, Henan, China