| COVID-19 | coronavirus disease 2019 |
| DLCO | diffusing capacity for carbon monoxide |
| FEV1 | forced expiratory volume in the 1st second |
| FVC | vital capacity |
| GGO | ground-glass opacity |
| KCO | carbon monoxide transfer coefficient |
| mMRC | modified Medical Research Council |
| PFT | pulmonary function test |
| TLC | total lung capacity |
| VA | alveolar volume |
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