| ARDS | acute respiratory distress syndrome |
| BAL | bronchoalveolar lavage |
| bp | base pairs |
| CI | confidence intervals |
| CT | computed tomography |
| DNA | deoxyribonucleic acid |
| IQR | interquartile range |
| ITS-2 | internal transcribed spacer 2 |
| LUS | lung ultrasound |
| OR | odds ratio |
| PCR | polymerase chain reaction |
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