| ETL | expiratory threshold load |
|---|---|
| FEF(25-75) | forced expiratory flow |
| FEF25-75 | forced expiratory flow between 25 and 75% of vital capacity |
| FEV 1-0 | forced expiratory volume |
| FEV1/ FVC | forced expiratory volume in one second/forced vital capacity |
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