| AE-IPF | acute exacerbation of idiopathic pulmonary fibrosis |
| BAL | bronchoalveolar lavage |
| CPFE | combined pulmonary fibrosis and emphysema |
| DLco | diffusing capacity of carbon monoxide |
| FVC | forced vital capacity |
| GGO | ground glass opacity |
| HRCT | high-resolution computed tomography |
| IPF | idiopathic pulmonary fibrosis |
| ROC | receiver-operating characteristic |
| VC | vital capacity |
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