Definitions of emphysema, chronic bronchitis, asthma, and airflow obstruction: 25 years on from the Ciba symposium
- PMID: 6701830
- PMCID: PMC459731
- DOI: 10.1136/thx.39.2.81
Definitions of emphysema, chronic bronchitis, asthma, and airflow obstruction: 25 years on from the Ciba symposium
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